diff --git a/src/pages/UI8/UI8.tsx b/src/pages/UI8/UI8.tsx
index 8c502d7..ceea1f3 100644
--- a/src/pages/UI8/UI8.tsx
+++ b/src/pages/UI8/UI8.tsx
@@ -33,9 +33,11 @@ const UI8: React.FC = () => {
     const loadPdf = async () => {
       try {
         setLoading(true);
+        window.electronAPI?.log("info", `开始加载PDF: ${PDF_URL}`);
         
         // 本地文件直接使用，无需通过 fetchPdf
         if (PDF_URL.startsWith("/") || PDF_URL.startsWith("blob:") || PDF_URL.includes("assets")) {
+          window.electronAPI?.log("info", `检测到本地PDF文件，直接加载: ${PDF_URL}`);
           setPdfData(PDF_URL);
           setLoading(false);
           return;
@@ -43,19 +45,26 @@ const UI8: React.FC = () => {
 
         // 远程 URL 需要通过 Electron 绕过 CORS
         if (window.electronAPI?.fetchPdf) {
+          window.electronAPI.log("info", `通过Electron下载远程PDF: ${PDF_URL}`);
           const result = await window.electronAPI.fetchPdf(PDF_URL);
           if (result.success && result.data) {
             // 将base64转换为data URL
+            window.electronAPI.log("info", `PDF下载成功，大小: ${result.data.length} bytes (base64)`);
             setPdfData(`data:application/pdf;base64,${result.data}`);
           } else {
-            setError(`PDF加载失败: ${result.error || "未知错误"}`);
+            const errorMsg = `PDF下载失败: ${result.error || "未知错误"}`;
+            window.electronAPI.log("error", errorMsg);
+            setError(errorMsg);
           }
         } else {
           // 非Electron环境，直接使用URL
+          window.electronAPI?.log("warn", "非Electron环境，直接使用URL加载");
           setPdfData(PDF_URL);
         }
       } catch (err) {
-        console.error("PDF fetch error:", err);
+        const errorMsg = `PDF fetch error: ${err}`;
+        console.error(errorMsg);
+        window.electronAPI?.log("error", errorMsg);
         setError("PDF加载失败，请检查网络连接");
       } finally {
         setLoading(false);
@@ -72,12 +81,16 @@ const UI8: React.FC = () => {
   // 打印PDF功能
   const handleConfirm = async () => {
     if (!window.electronAPI?.printPdf) {
-      alert("打印功能不可用，请在 Electron 环境中运行");
+      const errorMsg = "打印功能不可用，请在 Electron 环境中运行";
+      window.electronAPI?.log("error", errorMsg);
+      alert(errorMsg);
       return;
     }
 
     if (!pdfData) {
-      alert("PDF 尚未加载完成，请稍候");
+      const errorMsg = "PDF 尚未加载完成，请稍候";
+      window.electronAPI?.log("warn", errorMsg);
+      alert(errorMsg);
       return;
     }
 
@@ -85,12 +98,21 @@ const UI8: React.FC = () => {
     try {
       // 本地文件直接传原始路径，远程文件传 base64 data URI
       const printData = pdfData.startsWith("data:") ? pdfData : PDF_URL;
+      const dataType = pdfData.startsWith("data:") ? "base64数据" : "本地文件路径";
+      window.electronAPI.log("info", `开始打印PDF (${dataType}): ${printData.substring(0, 100)}...`);
+      
       const result = await window.electronAPI.printPdf(printData);
       if (!result.success) {
-        alert(`打印失败: ${result.error || "未知错误"}`);
+        const errorMsg = `打印失败: ${result.error || "未知错误"}`;
+        window.electronAPI.log("error", errorMsg);
+        alert(errorMsg);
+      } else {
+        window.electronAPI.log("info", "PDF打印请求已发送");
       }
     } catch (error) {
-      console.error("Print error:", error);
+      const errorMsg = `Print error: ${error}`;
+      console.error(errorMsg);
+      window.electronAPI.log("error", errorMsg);
       alert("打印失败，请重试");
     } finally {
       setIsPrinting(false);
@@ -98,15 +120,19 @@ const UI8: React.FC = () => {
   };
 
   const onDocumentLoadSuccess = ({ numPages }: { numPages: number }) => {
+    window.electronAPI?.log("info", `PDF渲染成功，共 ${numPages} 页`);
     setNumPages(numPages);
     setLoading(false);
     setError("");
   };
 
   const onDocumentLoadError = (error: Error) => {
+    const errorMsg = `PDF渲染失败: ${error.message || error}`;
+    console.error("PDF load error:", error);
+    window.electronAPI?.log("error", errorMsg);
+    window.electronAPI?.log("error", `PDF数据: ${pdfData?.substring(0, 100)}...`);
     setError("PDF 加载失败，请检查网络连接");
     setLoading(false);
-    console.error("PDF load error:", error);
   };
 
   const goToPrevPage = () => {
@@ -186,7 +212,7 @@ const UI8: React.FC = () => {
       <div className="basic-white-block">
         <div className="basic-content">
           <div className="ui8-pdf-container" ref={scrollContainerRef}>
-            {/* {loading && <div className="ui8-loading">加载中...</div>} */}
+            {loading && <div className="ui8-loading">PDF加载中...</div>}
             {error && <div className="ui8-error">{error}</div>}
             
             {pdfData && (