diff --git a/shell/otask.sh b/shell/otask.sh
index af8dbc5b..e113f91a 100755
--- a/shell/otask.sh
+++ b/shell/otask.sh
@@ -269,6 +269,7 @@ check_file "${task_shell_params[@]}"
 if [[ $isJsOrPythonFile == 'false' ]]; then
   run_task_before "${task_shell_params[@]}"
 fi
+set_u_on="false"
 if set -o | grep -q 'nounset.*on'; then
   set_u_on="true"
   set +u
diff --git a/shell/share.sh b/shell/share.sh
index a6879aaf..989c4431 100755
--- a/shell/share.sh
+++ b/shell/share.sh
@@ -451,9 +451,9 @@ handle_task_start() {
 run_task_before() {
   . $file_task_before "$@"
 
-  if [[ $task_before ]]; then
+  if [[ ${task_before:=} ]]; then
     echo -e "执行前置命令\n"
-    eval "$task_before" "$@"
+    eval "${task_before%;}" "$@"
     echo -e "\n执行前置命令结束\n"
   fi
 }
@@ -463,7 +463,7 @@ run_task_after() {
 
   if [[ ${task_after:=} ]]; then
     echo -e "\n执行后置命令\n"
-    eval "$task_after" "$@"
+    eval "${task_after%;}" "$@"
     echo -e "\n执行后置命令结束"
   fi
 }