diff --git a/src/locales/en.json b/src/locales/en.json
index e959a4d9..8456d929 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -1137,6 +1137,7 @@
   "Placement service:": "Placement service:",
   "Platform Info": "Platform Info",
   "Please confirm your password!": "Please confirm your password!",
+  "Please enter a valid ASCII code": "Please enter a valid ASCII code",
   "Please enter a valid Email Address!": "Please enter a valid Email Address!",
   "Please enter a valid Phone Number": "Please enter a valid Phone Number",
   "Please enter complete key value!": "Please enter complete key value!",
diff --git a/src/locales/zh.json b/src/locales/zh.json
index eba79604..8ab18170 100644
--- a/src/locales/zh.json
+++ b/src/locales/zh.json
@@ -1137,6 +1137,7 @@
   "Placement service:": "放置服务(placement):",
   "Platform Info": "平台概况",
   "Please confirm your password!": "请确认您的密码",
+  "Please enter a valid ASCII code": "请输入有效的ASCII码",
   "Please enter a valid Email Address!": "请输入一个有效的邮箱地址",
   "Please enter a valid Phone Number": "请输入一个有效的手机号",
   "Please enter complete key value!": "请输入完整的键值！",
diff --git a/src/pages/compute/containers/Instance/actions/StepCreate/SystemStep/index.jsx b/src/pages/compute/containers/Instance/actions/StepCreate/SystemStep/index.jsx
index e9a4ac3f..2b61dd4e 100644
--- a/src/pages/compute/containers/Instance/actions/StepCreate/SystemStep/index.jsx
+++ b/src/pages/compute/containers/Instance/actions/StepCreate/SystemStep/index.jsx
@@ -19,7 +19,7 @@ import globalHypervisorStore from 'stores/nova/hypervisor';
 import globalServerGroupStore from 'stores/nova/server-group';
 import policyType from 'resources/server-group';
 import Base from 'components/Form';
-import { getPasswordOtherRule } from 'utils/validate';
+import { getPasswordOtherRule, asciiValidator } from 'utils/validate';
 import { hypervisorColumns, hypervisorFilters } from 'resources/hypervisor';
 import { physicalNodeTypes } from 'resources/instance';
 
@@ -330,6 +330,7 @@ export class SystemStep extends Base {
         name: 'userData',
         label: t('User Data'),
         type: 'textarea-from-file',
+        validator: asciiValidator,
         hidden: !more,
         extra: t(
           'The user needs to ensure that the input is a shell script that can run completely and normally.'
diff --git a/src/utils/validate.js b/src/utils/validate.js
index 24437622..cba44d52 100644
--- a/src/utils/validate.js
+++ b/src/utils/validate.js
@@ -53,6 +53,7 @@ const instanceNameRegex =
   /^[a-zA-Z\u4e00-\u9fa5][\u4e00-\u9fa5\w"'._-]{0,127}$/;
 const ipv6CidrOnly =
   /^(([a-zA-Z]|[a-zA-Z][a-zA-Z0-9-]*[a-zA-Z0-9])\.)*([A-Za-z]|[A-Za-z][A-Za-z0-9-]*[A-Za-z0-9])$|^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(%.+)?\s*\/(1[01][0-9]|12[0-8]|[0-9]{1,2})$/;
+const asciiRegex = /^[\x00-\x7f]*$/; // eslint-disable-line
 
 export const regex = {
   cidr,
@@ -71,6 +72,7 @@ export const regex = {
   imageNameRegex,
   instanceNameRegex,
   ipv6CidrOnly,
+  asciiRegex,
 };
 
 export const isPhoneNumber = (value) => phone(value).isValid;
@@ -335,6 +337,8 @@ export const macAddressMessage = t(
   'Invalid Mac Address. Please Use ":" as separator.'
 );
 
+const asciiMessage = t('Please enter a valid ASCII code');
+
 export const phoneNumberValidate = (rule, value) => {
   if (!rule.required && !value) {
     return Promise.resolve(true);
@@ -588,3 +592,10 @@ export const jsonValidator = (item, value) => {
   }
   return Promise.resolve(true);
 };
+
+export const asciiValidator = (rule, value) => {
+  if (asciiRegex.test(value)) {
+    return Promise.resolve(true);
+  }
+  return Promise.reject(new Error(`${t('Invalid: ')}${asciiMessage}`));
+};