diff --git a/script/batch_build_all_service.sh b/script/batch_build_all_service.sh
index c96b9dbe2..b48bd2436 100644
--- a/script/batch_build_all_service.sh
+++ b/script/batch_build_all_service.sh
@@ -36,7 +36,7 @@ done
 
 echo "wait all build finish....."
 
-success_num = 0
+success_num=0
 for ((i = 0; i < ${#service_source_root[*]}; i++)); do
   echo "wait pid: " ${build_pid_array[i]} ${service_names[$i]}
   wait ${build_pid_array[i]}