diff --git a/electron/idcard-worker.js b/electron/idcard-worker.js
index 3b6efc9..c7563a9 100644
--- a/electron/idcard-worker.js
+++ b/electron/idcard-worker.js
@@ -71,17 +71,23 @@ function loadDll() {
     });
     lib = koffi.load(dllPath);
 
+    // 尝试使用 stdcall 约定，这对于 Windows 32位 DLL 很常见
+    // 如果函数名被修饰（如 _Syn_FindUSBReader@0），__stdcall 会自动处理
+    const stdcall = "__stdcall";
+
     return {
-      Syn_FindUSBReader: lib.func("int Syn_FindUSBReader()"),
-      Syn_USBOpenPort: lib.func("int Syn_USBOpenPort(int)"),
-      Syn_USBClosePort: lib.func("int Syn_USBClosePort(int)"),
+      Syn_FindUSBReader: lib.func(`${stdcall} int Syn_FindUSBReader()`),
+      Syn_USBOpenPort: lib.func(`${stdcall} int Syn_USBOpenPort(int)`),
+      Syn_USBClosePort: lib.func(`${stdcall} int Syn_USBClosePort(int)`),
       Syn_USBStartFindIDCard: lib.func(
-        "int Syn_USBStartFindIDCard(int, uint8*, int)"
+        `${stdcall} int Syn_USBStartFindIDCard(int, uint8*, int)`
       ),
       Syn_USBSelectIDCard: lib.func(
-        "int Syn_USBSelectIDCard(int, uint8*, int)"
+        `${stdcall} int Syn_USBSelectIDCard(int, uint8*, int)`
+      ),
+      Syn_ReadMsg: lib.func(
+        `${stdcall} int Syn_ReadMsg(int, int, _Out_ IDCardData*)`
       ),
-      Syn_ReadMsg: lib.func("int Syn_ReadMsg(int, int, _Out_ IDCardData*)"),
     };
   } catch (err) {
     parentPort.postMessage({