diff --git a/transaction.go b/transaction.go
index 00d2e0a..cde5fa8 100755
--- a/transaction.go
+++ b/transaction.go
@@ -122,7 +122,7 @@ func TxUpdate(tx *sql.Tx, dbname, table string, data map[string]string, where ma
 	if strings.Contains(table, "select ") {
 		dbName = table
 	} else {
-		dbName = getTableName(dbName, table)
+		dbName = getTableName(dbname, table)
 	}
 	if len(data) < 1 {
 		return rowsAffected, errors.New("参数错误，没有要写入的数据")