diff --git a/app/Http/Controllers/Api/DialogController.php b/app/Http/Controllers/Api/DialogController.php
index 92bcf1caf..be61f423e 100755
--- a/app/Http/Controllers/Api/DialogController.php
+++ b/app/Http/Controllers/Api/DialogController.php
@@ -1022,6 +1022,10 @@ class DialogController extends AbstractController
      * @apiName msg__todo
      *
      * @apiParam {Number} msg_id            消息ID
+     * @apiParam {String} type              设待办对象
+     * - all: 会话全部成员（默认）
+     * - user: 会话指定成员
+     * @apiParam {Array} userids            会员ID组（type=user有效，格式: [userid1, userid2, userid3]）
      *
      * @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）
@@ -1032,6 +1036,16 @@ class DialogController extends AbstractController
         $user = User::auth();
         //
         $msg_id = intval(Request::input("msg_id"));
+        $type = trim(Request::input("type", "all"));
+        $userids = Request::input('userids');
+        //
+        if ($type === 'user') {
+            if (empty($userids)) {
+                return Base::retError("选择指定成员");
+            }
+        } else {
+            $userids = [];
+        }
         //
         $msg = WebSocketDialogMsg::whereId($msg_id)->first();
         if (empty($msg)) {
@@ -1039,7 +1053,7 @@ class DialogController extends AbstractController
         }
         WebSocketDialog::checkDialog($msg->dialog_id);
         //
-        return $msg->toggleTodoMsg($user->userid);
+        return $msg->toggleTodoMsg($user->userid, $userids);
     }
 
     /**
diff --git a/app/Http/Controllers/Api/UsersController.php b/app/Http/Controllers/Api/UsersController.php
index 3f2fa84c0..d6a523e2d 100755
--- a/app/Http/Controllers/Api/UsersController.php
+++ b/app/Http/Controllers/Api/UsersController.php
@@ -351,6 +351,7 @@ class UsersController extends AbstractController
      * - keys.disable                       0-排除禁止（默认），1-含禁止，2-仅禁止
      * - keys.project_id                    在指定项目ID
      * - keys.no_project_id                 不在指定项目ID
+     * - keys.dialog_id                     在指定对话ID
      * @apiParam {Object} sorts         排序方式
      * - sorts.az                           按字母：asc|desc
      * @apiParam {Number} updated_time  在这个时间戳之后更新的
@@ -401,6 +402,11 @@ class UsersController extends AbstractController
                 $query->select('userid')->from('project_users')->where('project_id', $keys['no_project_id']);
             });
         }
+        if (intval($keys['dialog_id']) > 0) {
+            $builder->whereIn('userid', function ($query) use ($keys) {
+                $query->select('userid')->from('web_socket_dialog_users')->where('dialog_id', $keys['dialog_id']);
+            });
+        }
         if (in_array($sorts['az'], ['asc', 'desc'])) {
             $builder->orderBy('az', $sorts['az']);
         }
diff --git a/app/Models/WebSocketDialogMsg.php b/app/Models/WebSocketDialogMsg.php
index 0ba6d8d22..e7cfab683 100644
--- a/app/Models/WebSocketDialogMsg.php
+++ b/app/Models/WebSocketDialogMsg.php
@@ -301,9 +301,10 @@ class WebSocketDialogMsg extends AbstractModel
     /**
      * 设待办、取消待办
      * @param int $sender       设待办的会员ID
+     * @param array $userids    设置给指定会员
      * @return mixed
      */
-    public function toggleTodoMsg($sender)
+    public function toggleTodoMsg($sender, $userids = [])
     {
         if (in_array($this->type, ['tag', 'todo', 'notice'])) {
             return Base::retError('此消息不支持社待办');
@@ -328,6 +329,7 @@ class WebSocketDialogMsg extends AbstractModel
                 'id' => $this->id,
                 'type' => $this->type,
                 'msg' => $this->msg,
+                'userids' => implode(",", $userids),
             ]
         ], $sender);
         if (Base::isSuccess($res)) {
@@ -336,8 +338,11 @@ class WebSocketDialogMsg extends AbstractModel
             $dialog->pushMsg('update', array_merge($resData, ['dialog_id' => $this->dialog_id]));
             //
             if ($this->todo) {
-                $userids = $dialog->dialogUser->pluck('userid')->toArray();
-                foreach ($userids as $userid) {
+                $useridList = $dialog->dialogUser->pluck('userid')->toArray();
+                foreach ($useridList as $userid) {
+                    if ($userids && !in_array($userid, $userids)) {
+                        continue;
+                    }
                     WebSocketDialogMsgTodo::createInstance([
                         'dialog_id' => $this->dialog_id,
                         'msg_id' => $this->id,
diff --git a/resources/assets/js/components/UserInput.vue b/resources/assets/js/components/UserInput.vue
index f5ac4b443..6d9bd38cd 100755
--- a/resources/assets/js/components/UserInput.vue
+++ b/resources/assets/js/components/UserInput.vue
@@ -86,6 +86,10 @@
                 type: Number,
                 default: 0
             },
+            dialogId: {
+                type: Number,
+                default: 0
+            },
         },
         data() {
             return {
@@ -161,6 +165,7 @@
                                 key,
                                 project_id: this.projectId,
                                 no_project_id: this.noProjectId,
+                                dialog_id: this.dialogId,
                             },
                             take: 50
                         },
diff --git a/resources/assets/js/pages/manage/components/DialogItem.vue b/resources/assets/js/pages/manage/components/DialogItem.vue
index 79c1c1040..c7c1b3eac 100644
--- a/resources/assets/js/pages/manage/components/DialogItem.vue
+++ b/resources/assets/js/pages/manage/components/DialogItem.vue
@@ -9,6 +9,13 @@
             <div class="todo-user"><UserAvatar :userid="source.userid" :tooltipDisabled="source.userid == userId" :show-name="true" :show-icon="false"/></div>
             {{$L(source.msg.action === 'remove' ? '取消待办' : (source.msg.action === 'done' ? '完成' : '设待办'))}}
             "{{$A.getMsgSimpleDesc(source.msg.data)}}"
+            <div v-if="formatTodoUser(source.msg.data).length > 0" class="todo-users">
+                <span>{{$L('给')}}</span>
+                <template v-for="(item, index) in formatTodoUser(source.msg.data)">
+                    <div v-if="index < 3" class="todo-user"><UserAvatar :userid="item" :tooltipDisabled="item == userId" :show-name="true" :show-icon="false"/></div>
+                    <div v-else-if="index == 3" class="todo-user">+{{formatTodoUser(source.msg.data).length - 3}}</div>
+                </template>
+            </div>
         </div>
         <div v-else-if="source.type === 'notice'" class="dialog-notice">
             {{source.msg.notice}}
@@ -136,6 +143,16 @@ export default {
             this.$store.dispatch("dialogMsgRead", this.source);
         },
 
+        formatTodoUser(data) {
+            if ($A.isJson(data)) {
+                const {userids} = data
+                if (userids) {
+                    return userids.split(",")
+                }
+            }
+            return []
+        },
+
         onViewTag() {
             this.onViewReply({
                 msg_id: this.source.id,
diff --git a/resources/assets/js/pages/manage/components/DialogWrapper.vue b/resources/assets/js/pages/manage/components/DialogWrapper.vue
index 55fab17a9..a4fff19ef 100644
--- a/resources/assets/js/pages/manage/components/DialogWrapper.vue
+++ b/resources/assets/js/pages/manage/components/DialogWrapper.vue
@@ -280,6 +280,28 @@
             </div>
         </Modal>
 
+        <!-- 设置待办 -->
+        <Modal
+            v-model="todoSettingShow"
+            :title="$L('设置待办')"
+            :mask-closable="false">
+            <Form ref="todoSettingForm" :model="todoSettingData" label-width="auto" @submit.native.prevent>
+                <FormItem prop="type" :label="$L('当前会话')">
+                    <RadioGroup v-model="todoSettingData.type">
+                        <Radio label="all">{{$L('所有成员')}}</Radio>
+                        <Radio label="user">{{$L('指定成员')}}</Radio>
+                    </RadioGroup>
+                </FormItem>
+                <FormItem v-if="todoSettingData.type === 'user'" prop="userids">
+                    <UserInput v-model="todoSettingData.userids" :dialog-id="dialogId" :placeholder="$L('选择指定成员')"/>
+                </FormItem>
+            </Form>
+            <div slot="footer" class="adaption">
+                <Button type="default" @click="todoSettingShow=false">{{$L('取消')}}</Button>
+                <Button type="primary" :loading="todoSettingLoad > 0" @click="onTodo('submit')">{{$L('确定')}}</Button>
+            </div>
+        </Modal>
+
         <!--群设置-->
         <DrawerOverlay
             v-model="groupInfoShow"
@@ -421,6 +443,13 @@ export default {
             replyListShow: false,
             replyListId: 0,
 
+            todoSettingShow: false,
+            todoSettingLoad: 0,
+            todoSettingData: {
+                type: 'all',
+                userids: [],
+            },
+
             todoViewLoad: false,
             todoViewShow: false,
             todoViewMid: 0,
@@ -1718,41 +1747,61 @@ export default {
             });
         },
 
-        onTodo() {
+        onTodo(type) {
             if (this.operateVisible) {
                 return
             }
-            const data = {
-                msg_id: this.operateItem.id,
-            }
-            //
-            $A.modalConfirm({
-                title: this.operateItem.todo ? '取消待办' : '设置待办',
-                content: this.operateItem.todo ? "撤回待办后，会话其他成员的待办也将消失。" : "设置为待办后，将通知会话所有成员。",
-                cancelText: '取消',
-                okText: '确定',
-                loading: true,
-                onOk: () => {
-                    return new Promise((resolve, reject) => {
-                        this.$store.dispatch("setLoad", {
-                            key: `msg-${data.msg_id}`,
-                            delay: 600
-                        })
-                        this.$store.dispatch("call", {
-                            url: 'dialog/msg/todo',
-                            data,
-                        }).then(({data, msg}) => {
-                            resolve(msg)
-                            this.tagOrTodoSuccess(data)
-                            this.onActive()
-                        }).catch(({msg}) => {
-                            reject(msg);
-                        }).finally(_ => {
-                            this.$store.dispatch("cancelLoad", `msg-${data.msg_id}`)
-                        });
-                    })
+            if (type === 'submit') {
+                if ($A.arrayLength(this.todoSettingData.userids) === 0) {
+                    $A.messageWarning("选择指定成员");
+                    return
                 }
-            });
+                this.todoSettingLoad++
+                this.onTodoSubmit(this.todoSettingData).then(msg => {
+                    $A.messageSuccess(msg)
+                    this.todoSettingShow = false
+                }).catch($A.messageError).finally(_ => {
+                    this.todoSettingLoad--
+                })
+            } else {
+                this.todoSettingData = {
+                    type: 'all',
+                    userids: [],
+                    msg_id: this.operateItem.id,
+                }
+                if (this.operateItem.todo) {
+                    $A.modalConfirm({
+                        content: "你确定取消待办吗？",
+                        cancelText: '取消',
+                        okText: '确定',
+                        loading: true,
+                        onOk: () => this.onTodoSubmit(this.todoSettingData)
+                    });
+                } else {
+                    this.todoSettingShow = true
+                }
+            }
+        },
+
+        onTodoSubmit(data) {
+            return new Promise((resolve, reject) => {
+                this.$store.dispatch("setLoad", {
+                    key: `msg-${data.msg_id}`,
+                    delay: 600
+                })
+                this.$store.dispatch("call", {
+                    url: 'dialog/msg/todo',
+                    data,
+                }).then(({data, msg}) => {
+                    resolve(msg)
+                    this.tagOrTodoSuccess(data)
+                    this.onActive()
+                }).catch(({msg}) => {
+                    reject(msg);
+                }).finally(_ => {
+                    this.$store.dispatch("cancelLoad", `msg-${data.msg_id}`)
+                });
+            })
         },
 
         tagOrTodoSuccess(data) {
diff --git a/resources/assets/sass/pages/components/dialog-wrapper.scss b/resources/assets/sass/pages/components/dialog-wrapper.scss
index 345a33d15..40b58c7bc 100644
--- a/resources/assets/sass/pages/components/dialog-wrapper.scss
+++ b/resources/assets/sass/pages/components/dialog-wrapper.scss
@@ -337,6 +337,22 @@
             .dialog-todo {
                 cursor: pointer;
 
+                .todo-users {
+                    display: inline-block;
+
+                    > div + div {
+                        padding-left: 8px;
+                        position: relative;
+
+                        &:before {
+                            content: "、";
+                            position: absolute;
+                            left: 0;
+                            bottom: 0;
+                        }
+                    }
+                }
+
                 .todo-user {
                     display: inline-block;
                 }