diff --git a/app/Http/Controllers/Admin/ParkingLicensePlateController.php b/app/Http/Controllers/Admin/ParkingLicensePlateController.php
index 030db6b..ef41ab7 100644
--- a/app/Http/Controllers/Admin/ParkingLicensePlateController.php
+++ b/app/Http/Controllers/Admin/ParkingLicensePlateController.php
@@ -92,9 +92,11 @@ class ParkingLicensePlateController extends BaseController
                 null,
                 __('admin.save_succeeded')
             );
-        } catch (ValidationException|CustomException $e) {
+        } catch (ValidationException $e) {
             throw $e;
-        } catch (Exception $e) {
+        } catch (CustomException $e) {
+            return $this->responseService->businessError($e->getMessage());
+        }  catch (Exception $e) {
             return $this->responseService->systemError(
                 __('exception.license_plate.create_failed') . '：'
                 . $e->getMessage()
@@ -107,6 +109,7 @@ class ParkingLicensePlateController extends BaseController
      * @param int   $id
      * @return void
      * @throws ValidationException
+     * @throws CustomException
      */
     protected function saveValidator(array $data, int $id = 0): void
     {
@@ -128,6 +131,12 @@ class ParkingLicensePlateController extends BaseController
         }
         $validator = Validator::make($data, $rules, $messages);
 
+        $error_str = $this->LicensePlateService->validateLicensePlate(
+            $data['number']
+        );
+        if ($error_str) {
+            throw new CustomException($error_str);
+        }
         if ($validator->fails()) {
             throw new ValidationException($validator);
         }
@@ -149,8 +158,10 @@ class ParkingLicensePlateController extends BaseController
                 null,
                 __('admin.update_succeeded')
             );
-        } catch (ValidationException|CustomException $e) {
+        } catch (ValidationException $e) {
             throw $e;
+        } catch (CustomException $e) {
+            return $this->responseService->businessError($e->getMessage());
         } catch (Exception $e) {
             return $this->responseService->systemError(
                 __('exception.license_plate.update_failed') . '：'