diff --git a/src/kit/shell/src/shellAuto.c b/src/kit/shell/src/shellAuto.c
index 970bf65ca2a4ec65ca67274239816d9aabd81426..a96aa3f5810e69bef42242e9d26d9528c8f8ce3e 100644
--- a/src/kit/shell/src/shellAuto.c
+++ b/src/kit/shell/src/shellAuto.c
@@ -31,7 +31,7 @@
 
 
 // extern function
-void insertChar(Command *cmd, char *c, int size);
+void insertStr(Command *cmd, char *str, int size);
 
 
 typedef struct SAutoPtr {
@@ -1077,7 +1077,7 @@ void printScreen(TAOS * con, Command * cmd, SWords * match) {
   }
   
   // insert new
-  insertChar(cmd, (char *)str, strLen);
+  insertStr(cmd, (char *)str, strLen);
 }
 
 
@@ -1192,7 +1192,7 @@ bool fillWithType(TAOS * con, Command * cmd, char* pre, int type) {
 
   // show
   int count = strlen(part);
-  insertChar(cmd, part, count);
+  insertStr(cmd, part, count);
   cntDel = count; // next press tab delete current append count
 
   free(str);
@@ -1220,7 +1220,7 @@ bool fillTableName(TAOS * con, Command * cmd, char* pre) {
 
   // show
   int count = strlen(part);
-  insertChar(cmd, part, count);
+  insertStr(cmd, part, count);
   cntDel = count; // next press tab delete current append count
   
   free(str);
@@ -1344,7 +1344,7 @@ bool appendAfterSelect(TAOS * con, Command * cmd, char* sql, int32_t len) {
     bool fieldEnd = fieldsInputEnd(p);
     // cheeck fields input end then insert from keyword
     if (fieldEnd && p[len-1] == ' ') {
-      insertChar(cmd, "from", 4);
+      insertStr(cmd, "from", 4);
       free(p);
       return true;
     }
@@ -1527,7 +1527,7 @@ bool matchOther(TAOS * con, Command * cmd) {
   if (p[len - 1] == '\\') {
     // append '\G'
     char a[] = "G;";
-    insertChar(cmd, a, 2);
+    insertStr(cmd, a, 2);
     return true;
   }
 
diff --git a/src/kit/shell/src/shellCommand.c b/src/kit/shell/src/shellCommand.c
index 2fe09691e3285c2e3031672404b0aa6ed7bac244..a14eeb5e9482e804d636e37a2842c8a58b221ee3 100644
--- a/src/kit/shell/src/shellCommand.c
+++ b/src/kit/shell/src/shellCommand.c
@@ -79,11 +79,22 @@ void insertChar(Command *cmd, char *c, int size) {
   /* update the values */
   cmd->commandSize += size;
   cmd->cursorOffset += size;
-  for (int i = 0; i < size; i++) {
-    mbtowc(&wc, c + i, size);
-    cmd->screenOffset += wcwidth(wc);
-    cmd->endOffset += wcwidth(wc);
-  } 
+  cmd->screenOffset += wcwidth(wc);
+  cmd->endOffset += wcwidth(wc);
+  showOnScreen(cmd);
+}
+
+void insertStr(Command *cmd, char *str, int size) {
+  clearScreen(cmd->endOffset + prompt_size, cmd->screenOffset + prompt_size);
+  /* update the buffer */
+  memmove(cmd->command + cmd->cursorOffset + size, cmd->command + cmd->cursorOffset,
+          cmd->commandSize - cmd->cursorOffset);
+  memcpy(cmd->command + cmd->cursorOffset, str, size);
+  /* update the values */
+  cmd->commandSize += size;
+  cmd->cursorOffset += size;
+  cmd->screenOffset += size;
+  cmd->endOffset += size; 
   showOnScreen(cmd);
 }