diff --git a/backend/Dockerfile b/backend/Dockerfile
index 49e86de1..4cbfda47 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -13,7 +13,6 @@ FROM alpine:latest
 WORKDIR /root
 COPY --from=build /go/src/app .
 COPY --from=build /go/bin/crawlab /usr/local/bin
-RUN ls
 
 EXPOSE 8000
 CMD ["crawlab"]
diff --git a/backend/services/node.go b/backend/services/node.go
index c567b36f..1bf5ed3d 100644
--- a/backend/services/node.go
+++ b/backend/services/node.go
@@ -223,6 +223,26 @@ func UpdateNodeStatus() {
 			}
 		}
 	}
+
+	// 遍历数据库中的节点列表
+	nodes, err := model.GetNodeList(nil)
+	for _, node := range nodes {
+		hasNode := false
+		for _, mac := range list {
+			if mac == node.Mac {
+				hasNode = true
+				break
+			}
+		}
+		if !hasNode {
+			node.Status = constants.StatusOffline
+			if err := node.Save(); err != nil {
+				log.Errorf(err.Error())
+				return
+			}
+			continue
+		}
+	}
 }
 
 // 更新节点数据