diff --git a/apps/shell/src/shcmd.c b/apps/shell/src/shcmd.c
index bc28932bd8544fb5662a7a084f0fdc4b2379d2bd..5d04431afa4250b8fe175b84dd0775cdd737b6fd 100755
--- a/apps/shell/src/shcmd.c
+++ b/apps/shell/src/shcmd.c
@@ -457,17 +457,11 @@ unsigned int OsCmdKeyShift(const char *cmdKey, char *cmdOut, unsigned int size)
 int OsTabCompletion(char *cmdKey, unsigned int *len)
 {
     int count;
-    char *cmdMainStr = cmdKey;
 
     if ((cmdKey == NULL) || (len == NULL)) {
         return (int)SH_ERROR;
     }
 
-    /* cut left space */
-    while (*cmdMainStr == 0x20) {
-        cmdMainStr++;
-    }
-
     count = OsTabMatchFile(cmdKey, len);
 
     return count;