diff --git a/common.go b/common.go
index a1c49a9..eb251f0 100644
--- a/common.go
+++ b/common.go
@@ -35,7 +35,9 @@ type common struct {
 //
 // Date : 21:25 2023/12/24
 func (c *common) initLock() {
-	c.lock = &sync.RWMutex{}
+	if c.dataTableType == normalDataTableType {
+		c.lock = &sync.RWMutex{}
+	}
 }
 
 // Lock ...
diff --git a/normal.go b/normal.go
index 7dbd61f..9988843 100644
--- a/normal.go
+++ b/normal.go
@@ -12,7 +12,7 @@ package easymap
 // Author : go_developer@163.com<白茶清欢>
 //
 // Date : 10:07 下午 2021/2/23
-func NewNormal(withLock bool) EasyMap {
-	em, _ := NewSegment(1, withLock)
+func NewNormal() EasyMap {
+	em, _ := NewSegment(1)
 	return em
 }