diff --git a/app/src/config/account.ts b/app/src/config/account.ts
index 54484bbe9..19fda7298 100644
--- a/app/src/config/account.ts
+++ b/app/src/config/account.ts
@@ -219,7 +219,11 @@ ${window.siyuan.languages.account8}`;
             });
             const activationCodeElement = account.element.querySelector("#activationCode");
             activationCodeElement.addEventListener("click", () => {
-                fetchPost("/api/account/checkActivationcode", {data: (activationCodeElement.previousElementSibling as HTMLInputElement).value}, (response) => {
+                const activationCodeInput = (activationCodeElement.previousElementSibling as HTMLInputElement)
+                fetchPost("/api/account/checkActivationcode", {data: activationCodeInput.value}, (response) => {
+                    if (0 !== response.code) {
+                        activationCodeInput.value = "";
+                    }
                     confirmDialog(window.siyuan.languages.activationCode, response.msg, () => {
                         if (response.code === 0) {
                             fetchPost("/api/account/useActivationcode", {data: (activationCodeElement.previousElementSibling as HTMLInputElement).value}, () => {