diff --git a/agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java b/agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java
index 6d8e4f3..d96658f 100644
--- a/agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java
+++ b/agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java
@@ -6,6 +6,8 @@ import org.eclipse.paho.client.mqttv3.MqttCallback;
 import org.eclipse.paho.client.mqttv3.MqttClient;
 import org.eclipse.paho.client.mqttv3.MqttException;
 import org.eclipse.paho.client.mqttv3.MqttMessage;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.stereotype.Component;
@@ -14,6 +16,7 @@ import javax.annotation.PostConstruct;
 import javax.annotation.Resource;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
@@ -46,6 +49,7 @@ public class MqttMessageHandler {
     @Value("${spring.mqtt.default-topic:dtu/+/up,frontend/+/control/+}")
     private String defaultTopic;
 
+    Logger log = LoggerFactory.getLogger(MqttMessageHandler.class);
     /**
      * 初始化：订阅主题+设置回调
      */
@@ -245,6 +249,14 @@ public class MqttMessageHandler {
      * @return 前端需要取消的MQTT主题列表（供前端批量取消）
      */
     public List<String> unsubscribeAllDevice(String clientId) {
+
+        // 适配低版本的Redis连接可用性校验（替换掉isRunning()）
+        try {
+            stringRedisTemplate.hasKey("test:connection");
+        } catch (Exception e) {
+            log.warn("Redis连接不可用，取消订阅操作跳过：{}", e.getMessage());
+            return Collections.emptyList();
+        }
         // 步骤1：查询该前端订阅的所有设备ID（Redis中所有sub:*集合中包含该clientId的key）
         // 注意：生产环境建议用scan代替keys，避免阻塞Redis
         Set<String> subKeys = stringRedisTemplate.keys("sub:*");