diff --git a/app/Models/ProjectTask.php b/app/Models/ProjectTask.php
index 1e67182cb..63c68f836 100644
--- a/app/Models/ProjectTask.php
+++ b/app/Models/ProjectTask.php
@@ -1609,14 +1609,18 @@ class ProjectTask extends AbstractModel
             'dialog_id' => $this->dialog_id,
         ];
         //
+        $projectOwnerids = ProjectUser::whereProjectId($this->project_id)->whereOwner(1)->pluck('userid')->toArray();  // 项目负责人
+        //
         $array = [];
         if (empty($userids)) {
             // 默认 项目成员 与 项目负责人，任务负责人、协助人的差集
             $projectUserids = ProjectUser::whereProjectId($this->project_id)->pluck('userid')->toArray();  // 项目成员
-            $projectOwner = ProjectUser::whereProjectId($this->project_id)->whereOwner(1)->pluck('userid')->toArray();  // 项目负责人
             $taskOwnerAndAssists = ProjectTaskUser::select(['userid', 'owner'])->whereIn('owner', [0, 1])->whereTaskId($this->id)->pluck('userid')->toArray();
             $subUserids = ProjectTaskUser::whereTaskPid($this->id)->pluck('userid')->toArray();
-            $userids = array_diff($projectUserids, $projectOwner, $taskOwnerAndAssists, $subUserids);
+            $userids = array_diff($projectUserids, $projectOwnerids, $taskOwnerAndAssists, $subUserids);
+        } else {
+            // 保证项目负责人都能看到
+            $userids = array_diff($userids, $projectOwnerids);
         }
         //
         $array[] = [
diff --git a/app/Observers/ProjectTaskObserver.php b/app/Observers/ProjectTaskObserver.php
index 3c2590819..809f3a29c 100644
--- a/app/Observers/ProjectTaskObserver.php
+++ b/app/Observers/ProjectTaskObserver.php
@@ -87,6 +87,9 @@ class ProjectTaskObserver
         if (in_array('project', $dataType)) {
             return ProjectUser::whereProjectId($projectTask->project_id)->pluck('userid')->toArray();
         }
+        if (in_array('projectOwnerUser', $dataType)) {
+            return ProjectUser::whereProjectId($projectTask->project_id)->where('owner', 1)->pluck('userid')->toArray();
+        }
         $array = [];
         if (in_array('task', $dataType)) {
             $array = array_merge($array, ProjectTaskUser::whereTaskId($projectTask->id)->pluck('userid')->toArray());
@@ -112,7 +115,8 @@ class ProjectTaskObserver
             case 3:
                 $dataType = $projectTask->visibility == 2 ? ['task'] : ['task', 'visibility'];
                 $forgetUserids = self::userids($projectTask, $dataType);
-                $recordUserids = array_diff($projectUserids, $forgetUserids);
+                $projectOwnerUserIds = self::userids($projectTask, 'projectOwnerUser');
+                $recordUserids = array_diff($projectUserids, $forgetUserids, $projectOwnerUserIds);
                 Deleted::record('projectTask', $projectTask->id, $recordUserids);
                 Deleted::forget('projectTask', $projectTask->id, $forgetUserids);
                 break;