diff --git a/src/UI/Components/MainContent/Regist.tsx b/src/UI/Components/MainContent/Regist.tsx
index aecf4b302..3e0d27f9c 100644
--- a/src/UI/Components/MainContent/Regist.tsx
+++ b/src/UI/Components/MainContent/Regist.tsx
@@ -117,10 +117,10 @@ export default class Regist extends React.Component<{ store?: TopPanelStore; }>
             });
             return;
         }
-        if (this.inputIntent.InviteCode !== Intent.SUCCESS)
+        if (this.inputIntent.InviteCode === Intent.DANGER)
         {
             AppToaster.show({
-                message: this.registInput.invite_code.length === 0 ? "邀请码不能为空" : "邀请码有误",
+                message: "邀请码有误",
                 intent: Intent.DANGER,
                 timeout: 1000,
             });
@@ -306,11 +306,11 @@ export default class Regist extends React.Component<{ store?: TopPanelStore; }>
                 break;
             case InputType.InviteCode:
                 text = this.registInput.invite_code;
-                if (this.inviteCode.test(text))
+                if (text === "" || this.inviteCode.test(text))
                 {
                     this.flag = InputType.OK;
                     this.errMsg = "";
-                    this.inputIntent.InviteCode = Intent.SUCCESS;
+                    this.inputIntent.InviteCode = (text === "" ? Intent.NONE : Intent.SUCCESS);
                 }
                 else
                 {
@@ -444,7 +444,7 @@ export default class Regist extends React.Component<{ store?: TopPanelStore; }>
                                         value={this.registInput.invite_code}
                                         intent={this.inputIntent.InviteCode}
                                         name="txt"
-                                        placeholder={"邀请码: 6位字母和数字"}
+                                        placeholder={"邀请码: 6位字母和数字(可选)"}
                                         onChange={e =>
                                         {
                                             this.registInput.invite_code = e.target.value;