diff --git a/config_center/dynamic_configuration.go b/config_center/dynamic_configuration.go
index 69f84213e7..a7a8e5a2a7 100644
--- a/config_center/dynamic_configuration.go
+++ b/config_center/dynamic_configuration.go
@@ -34,10 +34,10 @@ import (
 // DynamicConfiguration
 // ////////////////////////////////////////
 const (
-	// DEFAULT_GROUP: default group
+	// DEFAULT_GROUP default group
 	DEFAULT_GROUP = "dubbo"
-	// DEFAULT_CONFIG_TIMEOUT: default config timeout
-	DEFAULT_CONFIG_TIMEOUT = "10s"
+	// ZK_DEFAULT_GROUP default group of zk
+	ZK_DEFAULT_GROUP = "dubbo"
 )
 
 // DynamicConfiguration for modify listener and get properties file
diff --git a/config_center/nacos/impl.go b/config_center/nacos/impl.go
index a68a25a501..5d22cdc0e0 100644
--- a/config_center/nacos/impl.go
+++ b/config_center/nacos/impl.go
@@ -31,7 +31,6 @@ import (
 
 import (
 	"github.com/apache/dubbo-go/common"
-	"github.com/apache/dubbo-go/common/constant"
 	"github.com/apache/dubbo-go/common/logger"
 	"github.com/apache/dubbo-go/config_center"
 	"github.com/apache/dubbo-go/config_center/parser"
@@ -49,7 +48,6 @@ const (
 type nacosDynamicConfiguration struct {
 	config_center.BaseDynamicConfiguration
 	url          *common.URL
-	rootPath     string
 	wg           sync.WaitGroup
 	cltLock      sync.Mutex
 	done         chan struct{}
@@ -60,13 +58,12 @@ type nacosDynamicConfiguration struct {
 
 func newNacosDynamicConfiguration(url *common.URL) (*nacosDynamicConfiguration, error) {
 	c := &nacosDynamicConfiguration{
-		rootPath: "/" + url.GetParam(constant.CONFIG_NAMESPACE_KEY, config_center.DEFAULT_GROUP) + "/config",
-		url:      url,
-		done:     make(chan struct{}),
+		url:  url,
+		done: make(chan struct{}),
 	}
 	err := ValidateNacosClient(c)
 	if err != nil {
-		logger.Errorf("nacos client start error ,error message is %v", err)
+		logger.Errorf("nacos client start error, error message is %v", err)
 		return nil, err
 	}
 	c.wg.Add(1)
diff --git a/config_center/zookeeper/impl.go b/config_center/zookeeper/impl.go
index e0d8bcdcc0..fa6ae1a00e 100644
--- a/config_center/zookeeper/impl.go
+++ b/config_center/zookeeper/impl.go
@@ -62,11 +62,11 @@ type zookeeperDynamicConfiguration struct {
 func newZookeeperDynamicConfiguration(url *common.URL) (*zookeeperDynamicConfiguration, error) {
 	c := &zookeeperDynamicConfiguration{
 		url:      url,
-		rootPath: "/" + url.GetParam(constant.CONFIG_NAMESPACE_KEY, config_center.DEFAULT_GROUP) + "/config",
+		rootPath: "/" + url.GetParam(constant.CONFIG_NAMESPACE_KEY, config_center.ZK_DEFAULT_GROUP) + "/config",
 	}
 	err := zookeeper.ValidateZookeeperClient(c, ZkClient)
 	if err != nil {
-		logger.Errorf("zookeeper client start error ,error message is %v", err)
+		logger.Errorf("zookeeper client start error, error message is %v", err)
 		return nil, err
 	}
 	c.wg.Add(1)
@@ -227,7 +227,7 @@ func (c *zookeeperDynamicConfiguration) getPath(key string, group string) string
 
 func (c *zookeeperDynamicConfiguration) buildPath(group string) string {
 	if len(group) == 0 {
-		group = config_center.DEFAULT_GROUP
+		group = config_center.ZK_DEFAULT_GROUP
 	}
 	return c.rootPath + pathSeparator + group
 }