diff --git a/module/programplan/test/lib/programplan.unittest.class.php b/module/programplan/test/lib/programplan.unittest.class.php
index 49cac6f786..924e223168 100644
--- a/module/programplan/test/lib/programplan.unittest.class.php
+++ b/module/programplan/test/lib/programplan.unittest.class.php
@@ -602,4 +602,23 @@ class programplanTest
 
         return array('success' => '1');
     }
+
+    /**
+     * Test prepareEditPlan method.
+     *
+     * @param  int         $planID
+     * @param  int         $projectID
+     * @param  object      $plan
+     * @param  object|null $parentStage
+     * @access public
+     * @return object|false
+     */
+    public function prepareEditPlanTest(int $planID, int $projectID, object $plan, ?object $parentStage = null): object|false
+    {
+        $result = $this->zenInstance->prepareEditPlan($planID, $projectID, $plan, $parentStage);
+
+        if(dao::isError()) return dao::getError();
+
+        return $result;
+    }
 }
diff --git a/module/programplan/test/zen/prepareeditplan.php b/module/programplan/test/zen/prepareeditplan.php
new file mode 100755
index 0000000000..5d2c446e00
--- /dev/null
+++ b/module/programplan/test/zen/prepareeditplan.php
@@ -0,0 +1,103 @@
+#!/usr/bin/env php
+<?php
+
+/**
+
+title=测试 programplanZen::prepareEditPlan();
+timeout=0
+cid=0
+
+- 执行func模块的invokeArgs方法，参数是$instance, [3, 1, $plan, $parentStage]) ? 'success' : 'fail  @success
+- 执行属性end @完成时间不能小于开始时间
+- 执行属性begin @子阶段计划开始不能小于父阶段的计划开始时间 2024-01-01
+- 执行属性end @子阶段计划完成不能超过父阶段的计划完成时间 2024-01-31
+- 执行func模块的invokeArgs方法，参数是$instance, [3, 2, $researchPlan, null]) ? 'success' : 'fail  @success
+
+*/
+
+include dirname(__FILE__, 5). '/test/lib/init.php';
+su('admin');
+
+// 准备基础数据
+$table = zenData('project');
+$table->id->range('1-3');
+$table->name->range('测试项目,调研项目,阶段1');
+$table->type->range('project{2},stage');
+$table->begin->range('2024-01-01{3}');
+$table->end->range('2024-12-31{3}');
+$table->model->range('scrum,research,scrum');
+$table->acl->range('open{3}');
+$table->attribute->range('mix{2},request');
+$table->milestone->range('0{3}');
+$table->percent->range('0{3}');
+$table->parent->range('0{3}');
+$table->status->range('doing{3}');
+$table->gen(3);
+
+global $tester;
+$zen = initReference('programplan', 'zen');
+$func = $zen->getMethod('prepareEditPlan');
+$instance = $zen->newInstance();
+
+// 初始化所需的模型
+$instance->programplan = $tester->loadModel('programplan');
+
+// 测试步骤1: 正常情况 - 编辑一个有效的计划
+$plan = new stdclass();
+$plan->parent = 1;
+$plan->begin = '2024-01-10';
+$plan->end = '2024-01-20';
+$plan->percent = 15;
+
+$parentStage = new stdclass();
+$parentStage->begin = '2024-01-01';
+$parentStage->end = '2024-01-31';
+
+r($func->invokeArgs($instance, [3, 1, $plan, $parentStage]) ? 'success' : 'fail') && p() && e('success');
+
+dao::$errors = array();
+
+// 测试步骤2: 结束时间早于开始时间
+$invalidPlan = new stdclass();
+$invalidPlan->parent = 1;
+$invalidPlan->begin = '2024-01-20';
+$invalidPlan->end = '2024-01-10';
+$invalidPlan->percent = 10;
+
+$func->invokeArgs($instance, [3, 1, $invalidPlan, $parentStage]);
+r(dao::getError()) && p('end') && e('完成时间不能小于开始时间');
+
+dao::$errors = array();
+
+// 测试步骤3: 开始时间早于父阶段开始时间
+$earlyPlan = new stdclass();
+$earlyPlan->parent = 1;
+$earlyPlan->begin = '2023-12-15';
+$earlyPlan->end = '2024-01-20';
+$earlyPlan->percent = 10;
+
+$func->invokeArgs($instance, [3, 1, $earlyPlan, $parentStage]);
+r(dao::getError()) && p('begin') && e('子阶段计划开始不能小于父阶段的计划开始时间 2024-01-01');
+
+dao::$errors = array();
+
+// 测试步骤4: 结束时间晚于父阶段结束时间
+$latePlan = new stdclass();
+$latePlan->parent = 1;
+$latePlan->begin = '2024-01-10';
+$latePlan->end = '2024-02-15';
+$latePlan->percent = 10;
+
+$func->invokeArgs($instance, [3, 1, $latePlan, $parentStage]);
+r(dao::getError()) && p('end') && e('子阶段计划完成不能超过父阶段的计划完成时间 2024-01-31');
+
+dao::$errors = array();
+
+// 测试步骤5: 调研模式项目保持原有属性
+$researchPlan = new stdclass();
+$researchPlan->parent = 0;
+$researchPlan->begin = '2024-01-10';
+$researchPlan->end = '2024-01-20';
+$researchPlan->percent = 10;
+
+r($func->invokeArgs($instance, [3, 2, $researchPlan, null]) ? 'success' : 'fail') && p() && e('success');
\ No newline at end of file
diff --git a/module/programplan/test/zen/yaml/project_prepareeditplan.yaml b/module/programplan/test/zen/yaml/project_prepareeditplan.yaml
new file mode 100644
index 0000000000..ac7bc249fe
--- /dev/null
+++ b/module/programplan/test/zen/yaml/project_prepareeditplan.yaml
@@ -0,0 +1,28 @@
+title: 项目计划编辑测试数据
+desc: 为prepareEditPlan方法提供测试数据
+
+fields:
+- field: id
+  range: 1-5
+- field: name
+  range: 测试项目1,调研项目,阶段1,阶段2,父阶段
+- field: type
+  range: project{2},stage{3}
+- field: begin
+  range: 2024-01-01{5}
+- field: end
+  range: 2024-12-31{5}
+- field: model
+  range: scrum,research,scrum{3}
+- field: acl
+  range: open{5}
+- field: attribute
+  range: mix{4},request
+- field: milestone
+  range: 0{5}
+- field: percent
+  range: 0{5}
+- field: parent
+  range: 0{5}
+- field: status
+  range: doing{5}
\ No newline at end of file