diff --git a/packages/trpc/src/services/mount.service.ts b/packages/trpc/src/services/mount.service.ts
index 3095a72..b8e141f 100644
--- a/packages/trpc/src/services/mount.service.ts
+++ b/packages/trpc/src/services/mount.service.ts
@@ -231,10 +231,13 @@ function describeWebdavError(e: unknown, path?: string): string {
     return `连接失败：${short}`;
 }
 
-/** WebDAV 路径：补前导 /、去重斜杠、段级百分号编码（中文/空格） */
+/**
+ * WebDAV 路径：只做斜杠规范化。
+ * 不要 encodeURIComponent —— webdav 库内部 encodePath 会再编码一次，
+ * 双重编码（% → %25）会导致服务器 400 Bad Request。
+ */
 function normalizeWebdavPath(input: string): string {
-    const trimmed = input.trim() || "/";
+    const trimmed = (input || "/").trim().replace(/\\/g, "/");
     const parts = trimmed.split("/").filter(Boolean);
-    const encoded = parts.map((seg) => encodeURIComponent(decodeURIComponent(seg)));
-    return `/${encoded.join("/")}`;
+    return parts.length ? `/${parts.join("/")}` : "/";
 }