diff --git a/src/components/layout/Header.tsx b/src/components/layout/Header.tsx
index b6ce5d2..464ee9f 100644
--- a/src/components/layout/Header.tsx
+++ b/src/components/layout/Header.tsx
@@ -46,7 +46,18 @@ export default function Header() {
 
           {/* User Menu */}
           <div className="flex items-center space-x-4">
-            <div />
+            {/* GitHub Link */}
+            <a
+              href="https://github.com/lintsinghua/XCodeReviewer"
+              target="_blank"
+              rel="noopener noreferrer"
+              className="hidden md:flex items-center justify-center w-9 h-9 rounded-lg text-gray-700 hover:text-gray-900 hover:bg-gray-100 transition-all"
+              title="GitHub Repository"
+            >
+              <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 24 24" aria-hidden="true">
+                <path fillRule="evenodd" d="M12 2C6.477 2 2 6.484 2 12.017c0 4.425 2.865 8.18 6.839 9.504.5.092.682-.217.682-.483 0-.237-.008-.868-.013-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-1.988 1.029-2.688-.103-.253-.446-1.272.098-2.65 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0112 6.844c.85.004 1.705.115 2.504.337 1.909-1.296 2.747-1.027 2.747-1.027.546 1.379.202 2.398.1 2.651.64.7 1.028 1.595 1.028 2.688 0 3.848-2.339 4.695-4.566 4.943.359.309.678.92.678 1.855 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.019 10.019 0 0022 12.017C22 6.484 17.522 2 12 2z" clipRule="evenodd" />
+              </svg>
+            </a>
 
             {/* Mobile menu button */}
             <Button
@@ -83,7 +94,19 @@ export default function Header() {
                 </Link>
               ))}
               
-
+              {/* GitHub Link for Mobile */}
+              <a
+                href="https://github.com/lintsinghua/XCodeReviewer"
+                target="_blank"
+                rel="noopener noreferrer"
+                className="flex items-center px-3 py-2 text-base font-medium text-gray-700 hover:text-primary hover:bg-gray-50 rounded-md transition-colors"
+                onClick={() => setMobileMenuOpen(false)}
+              >
+                <svg className="w-5 h-5 mr-2" fill="currentColor" viewBox="0 0 24 24" aria-hidden="true">
+                  <path fillRule="evenodd" d="M12 2C6.477 2 2 6.484 2 12.017c0 4.425 2.865 8.18 6.839 9.504.5.092.682-.217.682-.483 0-.237-.008-.868-.013-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-1.988 1.029-2.688-.103-.253-.446-1.272.098-2.65 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0112 6.844c.85.004 1.705.115 2.504.337 1.909-1.296 2.747-1.027 2.747-1.027.546 1.379.202 2.398.1 2.651.64.7 1.028 1.595 1.028 2.688 0 3.848-2.339 4.695-4.566 4.943.359.309.678.92.678 1.855 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.019 10.019 0 0022 12.017C22 6.484 17.522 2 12 2z" clipRule="evenodd" />
+                </svg>
+                GitHub
+              </a>
             </div>
           </div>
         )}