diff --git a/modules/thing/src/main/java/com/thing/device/source/controller/IotThingSourceController.java b/modules/thing/src/main/java/com/thing/device/source/controller/IotThingSourceController.java
index d3d7761..b0451fe 100644
--- a/modules/thing/src/main/java/com/thing/device/source/controller/IotThingSourceController.java
+++ b/modules/thing/src/main/java/com/thing/device/source/controller/IotThingSourceController.java
@@ -148,6 +148,12 @@ public class IotThingSourceController {
         return new Result<List<String>>().ok(iotThingSourceService.attrGroup());
     }
 
+    @GetMapping("maxSort")
+    @Operation(summary="最大序号")
+    public Result<Long> getMaxSort(@RequestParam String configType,@RequestParam Long fromId,@RequestParam Long rootId)  {
+        return new Result<Long>().ok(iotThingSourceService.getMaxSort(configType,fromId,rootId));
+    }
+
     @PostMapping("attrGroupList")
     @Operation(summary="标签组")
     public Result<List<IotThingSourceDTO>> attrGroupRootId(@RequestBody IotThingSourceReqDTO iotThingSourceDTO)  {