diff --git a/app/Http/Controllers/Api/ProjectController.php b/app/Http/Controllers/Api/ProjectController.php
index 302659ab3..3e97444d7 100755
--- a/app/Http/Controllers/Api/ProjectController.php
+++ b/app/Http/Controllers/Api/ProjectController.php
@@ -302,6 +302,7 @@ class ProjectController extends AbstractController
      * @apiParam {String} [archive_method]  归档方式
      * @apiParam {Number} [archive_days]    自动归档天数
      * @apiParam {String} [ai_auto_analyze] AI自动分析（open|close）
+     * @apiParam {String} [task_template_share] 共享模板（open|close）
      *
      * @apiSuccess {Number} ret     返回状态码（1正确、0错误）
      * @apiSuccess {String} msg     返回信息（错误描述）
@@ -317,6 +318,7 @@ class ProjectController extends AbstractController
         $archive_method = Request::input('archive_method');
         $archive_days = intval(Request::input('archive_days'));
         $ai_auto_analyze = Request::input('ai_auto_analyze');
+        $task_template_share = Request::input('task_template_share');
         if (mb_strlen($name) < 2) {
             return Base::retError('项目名称不可以少于2个字');
         } elseif (mb_strlen($name) > 32) {
@@ -332,7 +334,7 @@ class ProjectController extends AbstractController
         }
         //
         $project = Project::userProject($project_id, true, true);
-        AbstractModel::transaction(function () use ($archive_days, $archive_method, $ai_auto_analyze, $desc, $name, $project) {
+        AbstractModel::transaction(function () use ($archive_days, $archive_method, $ai_auto_analyze, $task_template_share, $desc, $name, $project) {
             if ($project->name != $name) {
                 $project->addLog("修改项目名称", [
                     'change' => [$project->name, $name]
@@ -364,6 +366,12 @@ class ProjectController extends AbstractController
                 ]);
                 $project->ai_auto_analyze = $ai_auto_analyze;
             }
+            if (in_array($task_template_share, ['open', 'close']) && $project->task_template_share != $task_template_share) {
+                $project->addLog("修改共享模板", [
+                    'change' => [$project->task_template_share, $task_template_share]
+                ]);
+                $project->task_template_share = $task_template_share;
+            }
             $project->save();
         });
         $project->pushMsg('update');
@@ -2538,14 +2546,15 @@ class ProjectController extends AbstractController
         $task->pushMsg('add', $data);
         $task->taskPush(null, 0);
 
-        // 应用任务模板使用统计（不影响主流程；非成员或模板已删除时静默忽略）
+        // 应用任务模板使用统计（不影响主流程；非成员、模板已删除或共享模板已关闭时静默忽略）
         $templateId = intval(Request::input('template_id', 0));
         if ($templateId > 0) {
             $tpl = ProjectTaskTemplate::find($templateId);
             if ($tpl) {
                 $isMember = ProjectUser::where('project_id', $tpl->project_id)
                     ->where('userid', $user->userid)->exists();
-                if ($isMember) {
+                $shareEnabled = ($project->task_template_share ?: 'open') === 'open';
+                if ($isMember && ($tpl->project_id == $project->id || $shareEnabled)) {
                     $tpl->incrementUsage();
                 }
             }
@@ -3674,6 +3683,10 @@ class ProjectController extends AbstractController
         $currentProjectId = intval(Request::input('current_project_id', 0));
 
         $projectIds = ProjectUser::where('userid', $user->userid)->pluck('project_id');
+        $currentProject = $currentProjectId > 0 ? Project::find($currentProjectId) : null;
+        if ($currentProject && ($currentProject->task_template_share ?: 'open') === 'close') {
+            $projectIds = collect($projectIds)->filter(fn($id) => intval($id) === $currentProjectId)->values();
+        }
 
         $rows = ProjectTaskTemplate::with(['project:id,name'])
             ->whereIn('project_id', $projectIds)
@@ -3709,6 +3722,7 @@ class ProjectController extends AbstractController
      * @apiName task__template_search
      *
      * @apiParam {String} [keyword]    关键字（在 name/title/content 上模糊匹配）
+     * @apiParam {Number} [current_project_id] 当前项目 ID（共享模板关闭时仅返回本项目模板）
      * @apiParam {Number} [page=1]     页码
      * @apiParam {Number} [page_size=20] 每页条数（最大 50）
      *
@@ -3719,10 +3733,15 @@ class ProjectController extends AbstractController
     {
         $user = User::auth();
         $keyword = trim((string) Request::input('keyword', ''));
+        $currentProjectId = intval(Request::input('current_project_id', 0));
         $page = max(1, intval(Request::input('page', 1)));
         $pageSize = min(50, max(1, intval(Request::input('page_size', 20))));
 
         $projectIds = ProjectUser::where('userid', $user->userid)->pluck('project_id');
+        $currentProject = $currentProjectId > 0 ? Project::find($currentProjectId) : null;
+        if ($currentProject && ($currentProject->task_template_share ?: 'open') === 'close') {
+            $projectIds = collect($projectIds)->filter(fn($id) => intval($id) === $currentProjectId)->values();
+        }
 
         $q = ProjectTaskTemplate::with(['project:id,name', 'user:userid,nickname'])
             ->whereIn('project_id', $projectIds);
diff --git a/app/Models/Project.php b/app/Models/Project.php
index bf4b891c9..8f4937b08 100644
--- a/app/Models/Project.php
+++ b/app/Models/Project.php
@@ -22,6 +22,8 @@ use Request;
  * @property int|null $personal 是否个人项目
  * @property string|null $archive_method 自动归档方式
  * @property int|null $archive_days 自动归档天数
+ * @property string|null $ai_auto_analyze AI自动分析
+ * @property string|null $task_template_share 共享模板开关
  * @property string|null $user_simple 成员总数|1,2,3
  * @property int|null $dialog_id 聊天会话ID
  * @property \Illuminate\Support\Carbon|null $archived_at 归档时间
diff --git a/database/migrations/2026_05_11_000001_add_task_template_share_to_projects_table.php b/database/migrations/2026_05_11_000001_add_task_template_share_to_projects_table.php
new file mode 100644
index 000000000..2889498fe
--- /dev/null
+++ b/database/migrations/2026_05_11_000001_add_task_template_share_to_projects_table.php
@@ -0,0 +1,26 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddTaskTemplateShareToProjectsTable extends Migration
+{
+    public function up()
+    {
+        Schema::table('projects', function (Blueprint $table) {
+            if (!Schema::hasColumn('projects', 'task_template_share')) {
+                $table->string('task_template_share', 20)->default('open')->after('ai_auto_analyze')->comment('共享模板开关');
+            }
+        });
+    }
+
+    public function down()
+    {
+        Schema::table('projects', function (Blueprint $table) {
+            if (Schema::hasColumn('projects', 'task_template_share')) {
+                $table->dropColumn('task_template_share');
+            }
+        });
+    }
+}
diff --git a/language/original-api.txt b/language/original-api.txt
index 508a80fb3..f87439055 100644
--- a/language/original-api.txt
+++ b/language/original-api.txt
@@ -993,3 +993,4 @@ LDAP 用户缺少邮箱属性，请联系管理员配置
 不能将部门负责人任命为部门管理员
 该用户不存在
 无权操作此模板
+修改共享模板
diff --git a/language/original-web.txt b/language/original-web.txt
index c5683268c..e4856531c 100644
--- a/language/original-web.txt
+++ b/language/original-web.txt
@@ -2388,3 +2388,6 @@ AI任务分析
 来自(*)
 暂无可用模板
 加载中
+共享模板
+开启后，添加任务时可使用其他项目共享的任务模板。
+关闭后，添加任务时仅加载本项目模板，不显示其他项目共享模板。
diff --git a/resources/assets/js/pages/manage/components/ProjectPanel.vue b/resources/assets/js/pages/manage/components/ProjectPanel.vue
index e11e4d200..3e7c7affe 100644
--- a/resources/assets/js/pages/manage/components/ProjectPanel.vue
+++ b/resources/assets/js/pages/manage/components/ProjectPanel.vue
@@ -430,6 +430,14 @@
                     <div v-else-if="settingData.ai_auto_analyze === 'open'" class="form-tip">{{$L('新建任务后AI自动分析并给出建议。')}}</div>
                     <div v-else class="form-tip">{{$L('关闭后本项目将不再自动分析任务。')}}</div>
                 </FormItem>
+                <FormItem :label="$L('共享模板')" prop="task_template_share">
+                    <RadioGroup v-model="settingData.task_template_share">
+                        <Radio label="open">{{$L('开启')}}</Radio>
+                        <Radio label="close">{{$L('关闭')}}</Radio>
+                    </RadioGroup>
+                    <div v-if="settingData.task_template_share === 'open'" class="form-tip">{{$L('开启后，添加任务时可使用其他项目共享的任务模板。')}}</div>
+                    <div v-else class="form-tip">{{$L('关闭后，添加任务时仅加载本项目模板，不显示其他项目共享模板。')}}</div>
+                </FormItem>
             </Form>
             <div slot="footer" class="adaption">
                 <Button type="default" @click="settingShow=false">{{$L('取消')}}</Button>
@@ -1619,7 +1627,8 @@ export default {
                         desc: this.projectData.desc,
                         archive_method: this.projectData.archive_method,
                         archive_days: this.projectData.archive_days,
-                        ai_auto_analyze: this.projectData.ai_auto_analyze || 'open'
+                        ai_auto_analyze: this.projectData.ai_auto_analyze || 'open',
+                        task_template_share: this.projectData.task_template_share || 'open'
                     });
                     this.settingShow = true;
                     this.$nextTick(() => {
diff --git a/resources/assets/js/pages/manage/components/TaskAdd.vue b/resources/assets/js/pages/manage/components/TaskAdd.vue
index f4533bba7..ab3c93a27 100644
--- a/resources/assets/js/pages/manage/components/TaskAdd.vue
+++ b/resources/assets/js/pages/manage/components/TaskAdd.vue
@@ -196,7 +196,7 @@
         </div>
 
         <TaskExistTips ref="taskExistTipsRef" @onContinue="onAdd(addContinue, true)"/>
-        <TaskTemplateBrowser v-model="templateBrowserVisible" :current-project-id="addData.project_id" @pick="onPickFromBrowser" />
+        <TaskTemplateBrowser v-if="taskTemplateShareEnabled" v-model="templateBrowserVisible" :current-project-id="addData.project_id" @pick="onPickFromBrowser" />
     </div>
 </template>
 
@@ -294,6 +294,11 @@ export default {
     computed: {
         ...mapState(['cacheProjects', 'projectId', 'cacheColumns', 'taskPriority', 'taskTemplates', 'formOptions']),
 
+        taskTemplateShareEnabled() {
+            const project = (this.cacheProjects || []).find(({id}) => id == this.addData.project_id)
+            return !project || project.task_template_share !== 'close'
+        },
+
         taskDays() {
             const {times} = this.addData;
             const temp = $A.newDateString(times, "YYYY-MM-DD HH:mm");
@@ -316,6 +321,9 @@ export default {
             const all = this.taskTemplates || []
             const currentId = this.addData.project_id
             const ownTemplates = all.filter(t => t.project_id == currentId)
+            if (!this.taskTemplateShareEnabled) {
+                return [...ownTemplates].sort((a, b) => (a.sort || 0) - (b.sort || 0) || a.id - b.id)
+            }
             if (ownTemplates.length > 0) {
                 return [...ownTemplates].sort((a, b) => (a.sort || 0) - (b.sort || 0) || a.id - b.id)
             }
@@ -329,6 +337,9 @@ export default {
          * 是否存在"未在 chip 区展示的可见模板"——决定"更多"按钮显隐。
          */
         hasMoreTemplates() {
+            if (!this.taskTemplateShareEnabled) {
+                return false
+            }
             const all = this.taskTemplates || []
             const currentId = this.addData.project_id
             const ownCount = all.filter(t => t.project_id == currentId).length
@@ -576,7 +587,13 @@ export default {
             }
 
             this.loadIng++;
-            this.$store.dispatch("taskAdd", Object.assign({}, this.addData, {template_id: this.templateActiveID || 0})).then(({msg}) => {
+            const currentTemplate = this.templateActiveID
+                ? (this.taskTemplates || []).find(item => item.id === this.templateActiveID)
+                : null;
+            const templateId = currentTemplate && (this.taskTemplateShareEnabled || currentTemplate.project_id == this.addData.project_id)
+                ? this.templateActiveID
+                : 0;
+            this.$store.dispatch("taskAdd", Object.assign({}, this.addData, {template_id: templateId})).then(({msg}) => {
                 $A.messageSuccess(msg);
                 if (continued === true) {
                     this.addData = Object.assign({}, this.addData, this.templateCompareData, {subtasks: []});
@@ -639,6 +656,9 @@ export default {
         },
 
         openTemplateBrowser() {
+            if (!this.taskTemplateShareEnabled) {
+                return
+            }
             this.templateBrowserVisible = true
         },
 
@@ -647,6 +667,9 @@ export default {
         },
 
         setTaskTemplate(item, force = false) {
+            if (!this.taskTemplateShareEnabled && item.project_id != this.addData.project_id) {
+                return;
+            }
             if (force) {
                 this.templateActiveID = item.id;
                 this.addData.name = item.title;
diff --git a/resources/assets/js/pages/manage/components/TaskTemplateBrowser.vue b/resources/assets/js/pages/manage/components/TaskTemplateBrowser.vue
index 73ebb2d8f..da8609248 100644
--- a/resources/assets/js/pages/manage/components/TaskTemplateBrowser.vue
+++ b/resources/assets/js/pages/manage/components/TaskTemplateBrowser.vue
@@ -109,6 +109,7 @@ export default {
                     url: 'project/task/template_search',
                     data: {
                         keyword: this.keyword,
+                        current_project_id: this.currentProjectId || 0,
                         page: this.page,
                         page_size: this.pageSize,
                     },
diff --git a/resources/assets/js/store/actions.js b/resources/assets/js/store/actions.js
index 8f873a94c..12596ea60 100644
--- a/resources/assets/js/store/actions.js
+++ b/resources/assets/js/store/actions.js
@@ -3055,6 +3055,17 @@ export default {
      * @returns {Promise<void>}
      */
     async updateTaskTemplates({state, dispatch}, currentProjectId) {
+        const project = (state.cacheProjects || []).find(({id}) => id == currentProjectId)
+        if (project && project.task_template_share === 'close') {
+            const {data} = await dispatch("call", {
+                url: 'project/task/template_list',
+                data: {
+                    project_id: currentProjectId || 0,
+                },
+            })
+            state.taskTemplates = Array.isArray(data) ? data : []
+            return
+        }
         const {data} = await dispatch("call", {
             url: 'project/task/template_visible',
             data: {
diff --git a/tests/Feature/CrossProjectTaskTemplateTest.php b/tests/Feature/CrossProjectTaskTemplateTest.php
index 26badfa18..bb6a167fe 100644
--- a/tests/Feature/CrossProjectTaskTemplateTest.php
+++ b/tests/Feature/CrossProjectTaskTemplateTest.php
@@ -111,11 +111,45 @@ class CrossProjectTaskTemplateTest extends TestCase
         return ['total' => $total, 'items' => $items, 'page' => $page, 'page_size' => $pageSize];
     }
 
+    /**
+     * 复刻共享模板关闭后的搜索范围：目标项目关闭共享模板时，仅返回目标项目自己的模板。
+     */
+    private function callTemplateSearchForProject(int $userid, int $currentProjectId, string $keyword = '', int $page = 1, int $pageSize = 20): array
+    {
+        $projectIds = ProjectUser::where('userid', $userid)->pluck('project_id');
+        $currentProject = Project::find($currentProjectId);
+        if ($currentProject && ($currentProject->task_template_share ?: 'open') === 'close') {
+            $projectIds = collect($projectIds)->filter(fn($id) => intval($id) === $currentProjectId)->values();
+        }
+        $q = ProjectTaskTemplate::with(['project:id,name'])
+            ->whereIn('project_id', $projectIds);
+        if ($keyword !== '') {
+            $q->where(function ($q2) use ($keyword) {
+                $like = '%' . $keyword . '%';
+                $q2->where('name', 'like', $like)
+                    ->orWhere('title', 'like', $like)
+                    ->orWhere('content', 'like', $like);
+            });
+        }
+        $total = $q->count();
+        $items = $q->orderByDesc('use_count')
+            ->orderByDesc('last_used_at')
+            ->orderByDesc('created_at')
+            ->forPage($page, $pageSize)
+            ->get()
+            ->map(fn($tpl) => [
+                'id' => $tpl->id,
+                'project_id' => $tpl->project_id,
+                'name' => $tpl->name,
+            ])->toArray();
+        return ['total' => $total, 'items' => $items, 'page' => $page, 'page_size' => $pageSize];
+    }
+
     /**
      * 模拟 task__add 的"使用模板"副作用：检查 template_id 可见性，原子递增 use_count + 更新 last_used_at。
      * 不实际创建任务，只验证副作用。
      */
-    private function simulateUseTemplate(int $userid, int $templateId): void
+    private function simulateUseTemplate(int $userid, int $templateId, ?int $targetProjectId = null): void
     {
         if ($templateId <= 0) return;
         $tpl = ProjectTaskTemplate::find($templateId);
@@ -123,6 +157,13 @@ class CrossProjectTaskTemplateTest extends TestCase
         $isMember = ProjectUser::where('project_id', $tpl->project_id)
             ->where('userid', $userid)->exists();
         if (!$isMember) return;
+        if ($targetProjectId) {
+            $targetProject = Project::find($targetProjectId);
+            $shareEnabled = !$targetProject || ($targetProject->task_template_share ?: 'open') === 'open';
+            if ($tpl->project_id != $targetProjectId && !$shareEnabled) {
+                return;
+            }
+        }
         $tpl->incrementUsage();
     }
 
@@ -132,6 +173,10 @@ class CrossProjectTaskTemplateTest extends TestCase
     private function callTemplateVisible(int $userid, int $currentProjectId): array
     {
         $projectIds = ProjectUser::where('userid', $userid)->pluck('project_id');
+        $currentProject = Project::find($currentProjectId);
+        if ($currentProject && ($currentProject->task_template_share ?: 'open') === 'close') {
+            $projectIds = collect($projectIds)->filter(fn($id) => intval($id) === $currentProjectId)->values();
+        }
         return ProjectTaskTemplate::with(['project:id,name'])
             ->whereIn('project_id', $projectIds)
             ->orderByRaw('project_id = ? DESC', [$currentProjectId])
@@ -324,4 +369,55 @@ class CrossProjectTaskTemplateTest extends TestCase
         $this->simulateUseTemplate($alice->userid, 99999999);
         $this->assertTrue(true);
     }
+
+    public function test_visible_returns_only_current_project_templates_when_share_closed()
+    {
+        $alice = $this->makeUser('alice-' . uniqid() . '@test.com');
+        $projectA = $this->makeProject($alice->userid);
+        $projectB = $this->makeProject($alice->userid);
+        $projectB->task_template_share = 'close';
+        $projectB->save();
+        $this->makeTemplate($projectA, $alice->userid, ['name' => 'A1']);
+        $this->makeTemplate($projectB, $alice->userid, ['name' => 'B1']);
+
+        $result = $this->callTemplateVisible($alice->userid, $projectB->id);
+
+        $names = array_column($result, 'name');
+        $this->assertNotContains('A1', $names);
+        $this->assertContains('B1', $names);
+    }
+
+    public function test_search_returns_only_current_project_templates_when_share_closed()
+    {
+        $alice = $this->makeUser('alice-' . uniqid() . '@test.com');
+        $projectA = $this->makeProject($alice->userid);
+        $projectB = $this->makeProject($alice->userid);
+        $projectB->task_template_share = 'close';
+        $projectB->save();
+        $this->makeTemplate($projectA, $alice->userid, ['name' => 'shared']);
+        $this->makeTemplate($projectB, $alice->userid, ['name' => 'own']);
+
+        $result = $this->callTemplateSearchForProject($alice->userid, $projectB->id);
+
+        $names = array_column($result['items'], 'name');
+        $this->assertNotContains('shared', $names);
+        $this->assertContains('own', $names);
+    }
+
+    public function test_cross_project_template_usage_ignored_when_target_project_share_closed()
+    {
+        $alice = $this->makeUser('alice-' . uniqid() . '@test.com');
+        $projectA = $this->makeProject($alice->userid);
+        $projectB = $this->makeProject($alice->userid);
+        $projectB->task_template_share = 'close';
+        $projectB->save();
+        $tplA = $this->makeTemplate($projectA, $alice->userid, ['use_count' => 7]);
+        $tplB = $this->makeTemplate($projectB, $alice->userid, ['use_count' => 3]);
+
+        $this->simulateUseTemplate($alice->userid, $tplA->id, $projectB->id);
+        $this->simulateUseTemplate($alice->userid, $tplB->id, $projectB->id);
+
+        $this->assertSame(7, (int) $tplA->fresh()->use_count);
+        $this->assertSame(4, (int) $tplB->fresh()->use_count);
+    }
 }