diff --git a/dongjian-dashboard-back-dao/src/main/java/com/dongjian/dashboard/back/dao/ex/DeviceGroupRelationMapperExt.java b/dongjian-dashboard-back-dao/src/main/java/com/dongjian/dashboard/back/dao/ex/DeviceGroupRelationMapperExt.java
index 903c24b..8dc308f 100644
--- a/dongjian-dashboard-back-dao/src/main/java/com/dongjian/dashboard/back/dao/ex/DeviceGroupRelationMapperExt.java
+++ b/dongjian-dashboard-back-dao/src/main/java/com/dongjian/dashboard/back/dao/ex/DeviceGroupRelationMapperExt.java
@@ -3,7 +3,10 @@ package com.dongjian.dashboard.back.dao.ex;
 import com.dongjian.dashboard.back.dao.auto.DeviceGroupRelationMapper;
 import org.apache.ibatis.annotations.Mapper;
 
+import java.util.List;
+
 @Mapper
 public interface DeviceGroupRelationMapperExt extends DeviceGroupRelationMapper {
 
+    List<Integer> selectDeviceInfoIdsByGroupId(Long groupId);
 }
diff --git a/dongjian-dashboard-back-dao/src/main/resources/mappers/ex/DeviceGroupRelationMapperExt.xml b/dongjian-dashboard-back-dao/src/main/resources/mappers/ex/DeviceGroupRelationMapperExt.xml
new file mode 100644
index 0000000..2c70214
--- /dev/null
+++ b/dongjian-dashboard-back-dao/src/main/resources/mappers/ex/DeviceGroupRelationMapperExt.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.dongjian.dashboard.back.dao.ex.DeviceGroupRelationMapperExt">
+
+    <select id="selectDeviceInfoIdsByGroupId" resultType="int">
+        SELECT device_info_id
+            FROM dashboard_device_group_relation
+        WHERE device_group_id = #{deviceGroupId}
+    </select>
+
+
+</mapper>
\ No newline at end of file
diff --git a/dongjian-dashboard-back-model/src/main/java/com/dongjian/dashboard/back/dto/devicegroup/BindDeviceForGroupParams.java b/dongjian-dashboard-back-model/src/main/java/com/dongjian/dashboard/back/dto/devicegroup/BindDeviceForGroupParams.java
index 9dcbb86..cf82076 100644
--- a/dongjian-dashboard-back-model/src/main/java/com/dongjian/dashboard/back/dto/devicegroup/BindDeviceForGroupParams.java
+++ b/dongjian-dashboard-back-model/src/main/java/com/dongjian/dashboard/back/dto/devicegroup/BindDeviceForGroupParams.java
@@ -7,7 +7,7 @@ import lombok.Data;
 @Data
 public class BindDeviceForGroupParams {
 
-	@Schema(description = "组ID",example = "27,587")
+	@Schema(description = "组ID",example = "587")
 	private Long deviceGroupId;
 
 	@Schema(description = "设备主键ID，多个使用半角字符逗号连接，注意不是设备ID")
diff --git a/dongjian-dashboard-back-service/src/main/java/com/dongjian/dashboard/back/service/impl/DeviceGroupServiceImpl.java b/dongjian-dashboard-back-service/src/main/java/com/dongjian/dashboard/back/service/impl/DeviceGroupServiceImpl.java
index b91ecba..c4c053b 100644
--- a/dongjian-dashboard-back-service/src/main/java/com/dongjian/dashboard/back/service/impl/DeviceGroupServiceImpl.java
+++ b/dongjian-dashboard-back-service/src/main/java/com/dongjian/dashboard/back/service/impl/DeviceGroupServiceImpl.java
@@ -358,9 +358,23 @@ public class DeviceGroupServiceImpl implements DeviceGroupService {
 
 			List<Long> deviceInfoIdList = CommonUtil.commaStr2LongList(bindDeviceForGroupParams.getDeviceInfoIds());
 
-			// 4. 插入新绑定关系
-			if (CollectionUtils.isNotEmpty(deviceInfoIdList)) {
-				for (Long deviceInfoId : deviceInfoIdList){
+			if (CollectionUtils.isEmpty(deviceInfoIdList)) {
+				return SimpleDataResponse.success();
+			}
+
+			Long groupId = bindDeviceForGroupParams.getDeviceGroupId();
+
+			List<Integer> existedIds = deviceGroupRelationMapperExt.selectDeviceInfoIdsByGroupId(groupId);
+			Set<Integer> existedSet = new HashSet<>(existedIds);
+
+			// 过滤掉已绑定的
+			List<Long> filteredList = deviceInfoIdList.stream()
+					.filter(id -> !existedSet.contains(id.intValue()))
+					.collect(Collectors.toList());
+
+			// 插入新绑定关系
+			if (CollectionUtils.isNotEmpty(filteredList)) {
+				for (Long deviceInfoId : filteredList){
 					DeviceGroupRelation deviceGroupRelation = new DeviceGroupRelation();
 					deviceGroupRelation.setDeviceGroupId(bindDeviceForGroupParams.getDeviceGroupId());
 					deviceGroupRelation.setDeviceInfoId(deviceInfoId.intValue());