diff --git a/backend/mpc-system/services/service-party-app/src/pages/Settings.tsx b/backend/mpc-system/services/service-party-app/src/pages/Settings.tsx
index 80d8307f..9ee97ccc 100644
--- a/backend/mpc-system/services/service-party-app/src/pages/Settings.tsx
+++ b/backend/mpc-system/services/service-party-app/src/pages/Settings.tsx
@@ -185,6 +185,8 @@ export default function Settings() {
                     const result = await window.electronAPI.kava.switchNetwork('testnet');
                     if (result.success) {
                       setKavaNetwork('testnet');
+                      // 同步到 localStorage 供前端工具函数使用
+                      localStorage.setItem('kava_network', 'testnet');
                       setMessage({ type: 'success', text: '已切换到 Kava 测试网' });
                     }
                   }}
@@ -197,6 +199,8 @@ export default function Settings() {
                     const result = await window.electronAPI.kava.switchNetwork('mainnet');
                     if (result.success) {
                       setKavaNetwork('mainnet');
+                      // 同步到 localStorage 供前端工具函数使用
+                      localStorage.setItem('kava_network', 'mainnet');
                       setMessage({ type: 'success', text: '已切换到 Kava 主网' });
                     }
                   }}