diff --git a/app/Http/Controllers/Api/ProjectController.php b/app/Http/Controllers/Api/ProjectController.php
index 1761c882..545f0cdf 100755
--- a/app/Http/Controllers/Api/ProjectController.php
+++ b/app/Http/Controllers/Api/ProjectController.php
@@ -1170,6 +1170,9 @@ class ProjectController extends AbstractController
         $name = Request::input('name');
         //
         $task = ProjectTask::userTask($task_id, true, true);
+        if ($task->complete_at) {
+            return Base::retError('主任务已完成无法添加子任务');
+        }
         //
         $task = ProjectTask::addTask([
             'name' => $name,
@@ -1761,6 +1764,9 @@ class ProjectController extends AbstractController
         $list = $builder->orderByDesc('created_at')->paginate(Base::getPaginate(100, 20));
         $list->transform(function (ProjectLog $log) use ($task_id) {
             $timestamp = Carbon::parse($log->created_at)->timestamp;
+            if ($task_id === 0) {
+                $log->projectTask?->cancelAppend();
+            }
             $log->time = [
                 'ymd' => date(date("Y", $timestamp) == date("Y", Base::time()) ? "m-d" : "Y-m-d", $timestamp),
                 'hi' => date("h:i", $timestamp) ,
diff --git a/app/Models/AbstractModel.php b/app/Models/AbstractModel.php
index c18e5424..1a5e8f01 100644
--- a/app/Models/AbstractModel.php
+++ b/app/Models/AbstractModel.php
@@ -17,6 +17,7 @@ use Illuminate\Support\Facades\DB;
  * @method static \Illuminate\Database\Eloquent\Builder|AbstractModel query()
  * @method static \Illuminate\Database\Eloquent\Builder|AbstractModel saveOrIgnore()
  * @method static \Illuminate\Database\Eloquent\Builder|AbstractModel getKeyValue()
+ * @method static \Illuminate\Database\Eloquent\Model|object|static|null cancelAppend()
  * @method static \Illuminate\Database\Eloquent\Builder|static with($relations)
  * @method static \Illuminate\Database\Query\Builder|static select($columns = [])
  * @method static \Illuminate\Database\Query\Builder|static whereNotIn($column, $values, $boolean = 'and')
@@ -62,6 +63,15 @@ class AbstractModel extends Model
         return $this->$key;
     }
 
+    /**
+     * 取消附加值
+     * @return static
+     */
+    protected function scopeCancelAppend()
+    {
+        return $this->setAppends([]);
+    }
+
     /**
      * 为数组 / JSON 序列化准备日期。
      * @param DateTimeInterface $date
diff --git a/app/Models/ProjectTask.php b/app/Models/ProjectTask.php
index 9b2f0c90..346dc0cc 100644
--- a/app/Models/ProjectTask.php
+++ b/app/Models/ProjectTask.php
@@ -112,7 +112,7 @@ class ProjectTask extends AbstractModel
     public function getFileNumAttribute()
     {
         if (!isset($this->appendattrs['file_num'])) {
-            $this->appendattrs['file_num'] = ProjectTaskFile::whereTaskId($this->id)->count();
+            $this->appendattrs['file_num'] = $this->parent_id > 0 ? 0 : ProjectTaskFile::whereTaskId($this->id)->count();
         }
         return $this->appendattrs['file_num'];
     }
@@ -494,6 +494,8 @@ class ProjectTask extends AbstractModel
             if (version_compare(Base::getClientVersion(), '0.6.0', '<')) {
                 throw new ApiException('当前版本过低');
             }
+            // 主任务
+            $mainTask = $this->parent_id > 0 ? self::find($this->parent_id) : null;
             // 工作流
             if (Arr::exists($data, 'flow_item_id')) {
                 if ($this->flow_item_id == $data['flow_item_id']) {
@@ -564,6 +566,10 @@ class ProjectTask extends AbstractModel
             }
             // 状态
             if (Arr::exists($data, 'complete_at')) {
+                // 子任务：主任务已完成时无法修改
+                if ($mainTask?->complete_at) {
+                    throw new ApiException('主任务已完成，无法修改子任务状态');
+                }
                 if (Base::isDate($data['complete_at'])) {
                     // 标记已完成
                     if ($this->complete_at) {
@@ -646,7 +652,6 @@ class ProjectTask extends AbstractModel
                     $end_at = Carbon::parse($end);
                     if ($this->parent_id > 0) {
                         // 判断同步主任务时间（子任务时间 超出 主任务）
-                        $mainTask = self::find($this->parent_id);
                         if ($mainTask) {
                             $isUp = false;
                             if ($start_at->lt(Carbon::parse($mainTask->start_at))) {
@@ -669,7 +674,6 @@ class ProjectTask extends AbstractModel
                 } else {
                     if ($this->parent_id > 0) {
                         // 清空子任务时间（子任务时间等于主任务时间）
-                        $mainTask = self::find($this->parent_id);
                         $this->start_at = $mainTask->start_at;
                         $this->end_at = $mainTask->end_at;
                     }
@@ -798,9 +802,7 @@ class ProjectTask extends AbstractModel
     {
         if ($this->parent_id > 0) {
             $task = self::find($this->parent_id);
-            if ($task) {
-                $task->syncDialogUser();
-            }
+            $task?->syncDialogUser();
             return;
         }
         if (empty($this->dialog_id)) {
@@ -872,24 +874,6 @@ class ProjectTask extends AbstractModel
         return $this->appendattrs['has_owner'];
     }
 
-    /**
-     * 是否负责人
-     * @param bool $isParent 是父级任务的负责人也算
-     * @return bool
-     */
-    public function isOwner($isParent = true) {
-        if ($this->owner) {
-            return true;
-        }
-        if ($isParent && $this->parent_id > 0) {
-            $parentTask = self::find($this->parent_id);
-            if ($parentTask?->owner) {
-                return true;
-            }
-        }
-        return false;
-    }
-
     /**
      * 标记已完成、未完成
      * @param Carbon|null $complete_at 完成时间