diff --git a/internal/app/controller/plan/plan_controller.go b/internal/app/controller/plan/plan_controller.go
index 4f9782f..09e0ed9 100644
--- a/internal/app/controller/plan/plan_controller.go
+++ b/internal/app/controller/plan/plan_controller.go
@@ -235,9 +235,23 @@ func (c *Controller) UpdatePlan(ctx *gin.Context) {
 // @Failure      200 {object} controller.Response "业务失败，具体错误码和信息见响应体（例如400, 404, 500）"
 // @Router       /plans/{id} [delete]
 func (c *Controller) DeletePlan(ctx *gin.Context) {
-	// 占位符：此处应调用服务层或仓库层来删除计划
-	c.logger.Infof("收到删除计划请求 (占位符)")
-	controller.SendResponse(ctx, controller.CodeSuccess, "删除计划接口占位符", nil)
+	// 1. 从 URL 路径中获取 ID
+	idStr := ctx.Param("id")
+	id, err := strconv.ParseUint(idStr, 10, 32)
+	if err != nil {
+		controller.SendErrorResponse(ctx, controller.CodeBadRequest, "无效的计划ID格式")
+		return
+	}
+
+	// 2. 调用仓库层删除计划
+	if err := c.planRepo.DeletePlan(uint(id)); err != nil {
+		c.logger.Errorf("删除计划失败: %v", err)
+		controller.SendErrorResponse(ctx, controller.CodeInternalError, "删除计划时发生内部错误")
+		return
+	}
+
+	// 3. 发送成功响应
+	controller.SendResponse(ctx, controller.CodeSuccess, "计划删除成功", nil)
 }
 
 // StartPlan godoc
diff --git a/internal/app/controller/plan/plan_controller_test.go b/internal/app/controller/plan/plan_controller_test.go
index b20a7af..f4a535a 100644
--- a/internal/app/controller/plan/plan_controller_test.go
+++ b/internal/app/controller/plan/plan_controller_test.go
@@ -22,6 +22,7 @@ type MockPlanRepository struct {
 	CreatePlanFunc     func(plan *models.Plan) error
 	GetPlanByIDFunc    func(id uint) (*models.Plan, error)
 	ListBasicPlansFunc func() ([]models.Plan, error)
+	DeletePlanFunc     func(id uint) error
 }
 
 func (m *MockPlanRepository) ListBasicPlans() ([]models.Plan, error) {
@@ -48,7 +49,7 @@ func (m *MockPlanRepository) UpdatePlan(plan *models.Plan) error {
 }
 
 func (m *MockPlanRepository) DeletePlan(id uint) error {
-	panic("implement me")
+	return m.DeletePlanFunc(id)
 }
 
 // setupTestRouter 创建一个用于测试的 gin 引擎和控制器实例
@@ -60,6 +61,7 @@ func setupTestRouter(repo repository.PlanRepository) *gin.Engine {
 	router.POST("/plans", planController.CreatePlan)
 	router.GET("/plans/:id", planController.GetPlan)
 	router.GET("/plans", planController.ListPlans)
+	router.DELETE("/plans/:id", planController.DeletePlan)
 	return router
 }
 
@@ -359,3 +361,105 @@ func TestController_ListPlans(t *testing.T) {
 		assert.Equal(t, "获取计划列表时发生内部错误", resp.Message)
 	})
 }
+
+// TestController_DeletePlan 是 DeletePlan 的单元测试
+func TestController_DeletePlan(t *testing.T) {
+	t.Run("成功-删除计划", func(t *testing.T) {
+		// Arrange
+		mockRepo := &MockPlanRepository{
+			DeletePlanFunc: func(id uint) error {
+				assert.Equal(t, uint(1), id)
+				return nil // Simulate successful deletion
+			},
+		}
+		router := setupTestRouter(mockRepo)
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest(http.MethodDelete, "/plans/1", nil)
+
+		// Act
+		router.ServeHTTP(w, req)
+
+		// Assert
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeSuccess, resp.Code)
+		assert.Equal(t, "计划删除成功", resp.Message)
+		assert.Nil(t, resp.Data)
+	})
+
+	t.Run("失败-计划不存在", func(t *testing.T) {
+		// Arrange
+		mockRepo := &MockPlanRepository{
+			DeletePlanFunc: func(id uint) error {
+				return gorm.ErrRecordNotFound // Simulate not found
+			},
+		}
+		router := setupTestRouter(mockRepo)
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest(http.MethodDelete, "/plans/999", nil)
+
+		// Act
+		router.ServeHTTP(w, req)
+
+		// Assert
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeInternalError, resp.Code)
+		assert.Equal(t, "删除计划时发生内部错误", resp.Message)
+	})
+
+	t.Run("失败-无效的ID格式", func(t *testing.T) {
+		// Arrange
+		mockRepo := &MockPlanRepository{} // No repo call expected
+		router := setupTestRouter(mockRepo)
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest(http.MethodDelete, "/plans/abc", nil)
+
+		// Act
+		router.ServeHTTP(w, req)
+
+		// Assert
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeBadRequest, resp.Code)
+		assert.Equal(t, "无效的计划ID格式", resp.Message)
+	})
+
+	t.Run("失败-仓库层内部错误", func(t *testing.T) {
+		// Arrange
+		internalErr := errors.New("something went wrong")
+		mockRepo := &MockPlanRepository{
+			DeletePlanFunc: func(id uint) error {
+				return internalErr // Simulate internal error
+			},
+		}
+		router := setupTestRouter(mockRepo)
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest(http.MethodDelete, "/plans/1", nil)
+
+		// Act
+		router.ServeHTTP(w, req)
+
+		// Assert
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeInternalError, resp.Code)
+		assert.Equal(t, "删除计划时发生内部错误", resp.Message)
+	})
+}