diff --git a/src/main/resources/static/components/plugins/sysFilePreview/PdfIndex.vue b/src/main/resources/static/components/plugins/sysFilePreview/PdfIndex.vue
index 1dd1c21..598a4c0 100644
--- a/src/main/resources/static/components/plugins/sysFilePreview/PdfIndex.vue
+++ b/src/main/resources/static/components/plugins/sysFilePreview/PdfIndex.vue
@@ -66,6 +66,8 @@ module.exports = {
                     if (currentVersion !== this.previewVersion || !this.pdf) return
                     this.pdfObj = new Pdfh5('#pdf-container', {
                         pdfurl: pdfUrl,
+                        // 使用二进制数据直接交给 PDF.js，避免 Blob 转 Base64 后被 CSP 的 connect-src 拦截。
+                        responseType: 'arraybuffer',
                     })
                     this.pdfObj.on("complete", () => {
                         if (currentVersion !== this.previewVersion) return