diff --git a/app/src/main/java/io/legado/app/utils/UrlUtil.kt b/app/src/main/java/io/legado/app/utils/UrlUtil.kt
index e6dae84da..5f8a53292 100644
--- a/app/src/main/java/io/legado/app/utils/UrlUtil.kt
+++ b/app/src/main/java/io/legado/app/utils/UrlUtil.kt
@@ -149,7 +149,9 @@ object UrlUtil {
 
     /* 获取合法的文件后缀 */
     fun getSuffix(str: String, default: String? = null): String {
-        val suffix = CustomUrl(str).getUrl().substringAfterLast(".")
+        val suffix = CustomUrl(str).getUrl()
+            .substringAfterLast(".", "")
+            .substringBefore("?")
         //检查截取的后缀字符是否合法 [a-zA-Z0-9]
         val fileSuffixRegex = Regex("^[a-z\\d]+$", RegexOption.IGNORE_CASE)
         return if (suffix.length > 5 || !suffix.matches(fileSuffixRegex)) {