diff --git a/source/client/src/clientSmlLine.c b/source/client/src/clientSmlLine.c
index 8b11b2957df48b8c5486922525037e614431e567..c5832ce1ce526021696cdbd0d850fa93515f9add 100644
--- a/source/client/src/clientSmlLine.c
+++ b/source/client/src/clientSmlLine.c
@@ -436,27 +436,20 @@ static int32_t smlParseColKv(SSmlHandle *info, char **sql, char *sqlEnd, SSmlLin
     size_t      valueLen = 0;
     bool        valueEscaped = false;
     size_t      valueLenEscaped = 0;
-    bool        isInQuote = false;
+    int         quoteNum = 0;
     const char *escapeChar = NULL;
     while (*sql < sqlEnd) {
       // parse value
       if (unlikely(*(*sql) == QUOTE && (*(*sql - 1) != SLASH || (*sql - 1) == escapeChar))) {
-        isInQuote = !isInQuote;
+        quoteNum++;
         (*sql)++;
-        if(!isInQuote) {
-          if (unlikely(IS_SPACE(*sql) || IS_COMMA(*sql))) {
-            break;
-          }else{
-            smlBuildInvalidDataMsg(&info->msgBuf, "invalid data", *sql);
-            return TSDB_CODE_SML_INVALID_DATA;
-          }
+        if(quoteNum > 2){
+          break;
         }
         continue;
       }
-      if (!isInQuote) {
-        if (unlikely(IS_SPACE(*sql) || IS_COMMA(*sql))) {
-          break;
-        }
+      if (quoteNum % 2 == 0 && (unlikely(IS_SPACE(*sql) || IS_COMMA(*sql)))) {
+        break;
       }
       if (IS_SLASH_LETTER_IN_FIELD_VALUE(*sql) && (*sql - 1) != escapeChar) {
         escapeChar = *sql;
@@ -468,8 +461,8 @@ static int32_t smlParseColKv(SSmlHandle *info, char **sql, char *sqlEnd, SSmlLin
     }
     valueLen = *sql - value;
 
-    if (unlikely(isInQuote)) {
-      smlBuildInvalidDataMsg(&info->msgBuf, "only one quote", value);
+    if (unlikely(quoteNum != 0 && quoteNum != 2)) {
+      smlBuildInvalidDataMsg(&info->msgBuf, "unbalanced quotes", value);
       return TSDB_CODE_SML_INVALID_DATA;
     }
     if (unlikely(valueLen == 0)) {