diff --git a/module/productplan/model.php b/module/productplan/model.php
index e036dfdadb..c38790ce62 100644
--- a/module/productplan/model.php
+++ b/module/productplan/model.php
@@ -804,13 +804,14 @@ class productplanModel extends model
     }
 
     /**
+     * 将父计划的parent改为-1, 没有子计划的父计划的parent改为0。
      * Change parent field by planID.
      *
      * @param  int    $planID
      * @access public
-     * @return void
+     * @return bool
      */
-    public function changeParentField($planID)
+    public function changeParentField(int $planID): bool
     {
         $plan = $this->getById($planID);
         if($plan->parent <= 0) return true;
@@ -818,8 +819,7 @@ class productplanModel extends model
         $childCount = count($this->getChildren($plan->parent));
         $parent     = $childCount == 0 ? '0' : '-1';
 
-        $parentPlan = $this->dao->select('*')->from(TABLE_PRODUCTPLAN)->where('id')->eq($plan->parent)->andWhere('deleted')->eq(0)->fetch();
-        if($parentPlan)
+        if($childCount > 0)
         {
             $this->dao->update(TABLE_PRODUCTPLAN)->set('parent')->eq($parent)->where('id')->eq((int)$plan->parent)->exec();
         }
@@ -827,6 +827,8 @@ class productplanModel extends model
         {
             $this->dao->update(TABLE_PRODUCTPLAN)->set('parent')->eq('0')->where('id')->eq((int)$planID)->exec();
         }
+
+        return !dao::isError();
     }
 
     /**
diff --git a/module/productplan/test/model/changeparentfield.php b/module/productplan/test/model/changeparentfield.php
index ab20fee67a..0dd0b6fd10 100755
--- a/module/productplan/test/model/changeparentfield.php
+++ b/module/productplan/test/model/changeparentfield.php
@@ -1,25 +1,21 @@
 #!/usr/bin/env php
 <?php
-include dirname(__FILE__, 5) . '/test/lib/init.php';
-include dirname(Dirname(dirname(__FILE__))) . '/class/productplan.class.php';
-
 /**
 
 title=productplanModel->changeParentField();
+timeout=0
 cid=1
-pid=1
-
-传入ID为1的情况，返回true >> 1
-传入ID为5的情况，返回true，如不存在函数会报错 >> 1
 
 */
+include dirname(__FILE__, 5) . '/test/lib/init.php';
+include dirname(__FILE__, 2) . '/productplan.class.php';
 
-$plan = new productPlan('admin');
+zdTable('user')->gen(5);
+zdTable('productplan')->config('productplan')->gen(5);
 
-$planID = array();
-$planID[0] = 1;
-$planID[1] = 5;
+$planIdList = array(1, 2, 3);
 
-r($plan->changeParentField($planID[0])) && p() && e('1'); //传入ID为1的情况，返回true
-r($plan->changeParentField($planID[1])) && p() && e('1'); //传入ID为5的情况，返回true，如不存在函数会报错
-?>
\ No newline at end of file
+$planTester = new productplan('admin');
+r($planTester->changeParentFieldTest($planIdList[0])) && p('parent') && e('-1'); // 测试更新父计划的parent字段
+r($planTester->changeParentFieldTest($planIdList[1])) && p('parent') && e('1');  // 测试更新子计划的parent字段
+r($planTester->changeParentFieldTest($planIdList[2])) && p('parent') && e('0');  // 测试更新普通计划的parent字段
diff --git a/module/productplan/test/productplan.class.php b/module/productplan/test/productplan.class.php
index f994d138b2..03385e76c6 100644
--- a/module/productplan/test/productplan.class.php
+++ b/module/productplan/test/productplan.class.php
@@ -208,17 +208,19 @@ class productPlan
     }
 
     /**
-     * Change parent field
+     * 将父计划的parent改为-1, 没有子计划的父计划的parent改为0。
+     * Change parent field by planID.
      *
-     * @param  int    $planID
+     * @param  int          $planID
      * @access public
-     * @return true
+     * @return array|object
      */
-    public function changeParentField($planID)
+    public function changeParentFieldTest(int $planID): array|object
     {
-        $productplans = $this->productplan->changeParentField($planID);
+        $this->productplan->changeParentField($planID);
+
         if(dao::isError()) return dao::getError();
-        return $productplans;
+        return $this->productplan->getByID($planID);
     }
 
     /**