diff --git a/app/Models/ProjectTask.php b/app/Models/ProjectTask.php
index 998d4fea8..3a4bea77f 100644
--- a/app/Models/ProjectTask.php
+++ b/app/Models/ProjectTask.php
@@ -753,6 +753,9 @@ class ProjectTask extends AbstractModel
                 $this->addLog("修改{任务}时间", [
                     'change' => [$oldStringAt, $newStringAt]
                 ]);
+
+                //修改计划时间需要重置任务邮件提醒日志
+                ProjectTaskMailLog::whereTaskId($this->id)->delete();
             }
             // 以下紧顶级任务可修改
             if ($this->parent_id === 0) {
diff --git a/app/Models/ProjectTaskMailLog.php b/app/Models/ProjectTaskMailLog.php
index 21a2432a1..984be8c2d 100644
--- a/app/Models/ProjectTaskMailLog.php
+++ b/app/Models/ProjectTaskMailLog.php
@@ -5,6 +5,8 @@ namespace App\Models;
 
 
 
+use Illuminate\Database\Eloquent\SoftDeletes;
+
 /**
  * App\Models\ProjectTaskMailLog
  *
@@ -16,10 +18,12 @@ namespace App\Models;
  * @property int|null $is_send 邮件发送是否成功：0否，1是
  * @property \Illuminate\Support\Carbon|null $created_at
  * @property \Illuminate\Support\Carbon|null $updated_at
+ * @property \Illuminate\Support\Carbon|null $deleted_at
  * @method static \Illuminate\Database\Eloquent\Builder|ProjectTaskMailLog newModelQuery()
  * @method static \Illuminate\Database\Eloquent\Builder|ProjectTaskMailLog newQuery()
  * @method static \Illuminate\Database\Eloquent\Builder|ProjectTaskMailLog query()
  * @method static \Illuminate\Database\Eloquent\Builder|ProjectTaskMailLog whereCreatedAt($value)
+ * @method static \Illuminate\Database\Eloquent\Builder|ProjectTaskMailLog whereDeletedAt($value)
  * @method static \Illuminate\Database\Eloquent\Builder|ProjectTaskMailLog whereEmail($value)
  * @method static \Illuminate\Database\Eloquent\Builder|ProjectTaskMailLog whereId($value)
  * @method static \Illuminate\Database\Eloquent\Builder|ProjectTaskMailLog whereIsSend($value)
@@ -31,6 +35,6 @@ namespace App\Models;
  */
 class ProjectTaskMailLog extends AbstractModel
 {
-
+    use SoftDeletes;
 
 }
diff --git a/database/migrations/2022_03_09_100139_add_project_task_mail_logs_add_deletes.php b/database/migrations/2022_03_09_100139_add_project_task_mail_logs_add_deletes.php
new file mode 100644
index 000000000..133e6f8c5
--- /dev/null
+++ b/database/migrations/2022_03_09_100139_add_project_task_mail_logs_add_deletes.php
@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddProjectTaskMailLogsAddDeletes extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('project_task_mail_logs', function (Blueprint $table) {
+            if (!Schema::hasColumn('project_task_mail_logs', 'deleted_at')) {
+                $table->softDeletes();
+            }
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('project_task_mail_logs', function (Blueprint $table) {
+            $table->dropSoftDeletes();
+        });
+    }
+}