diff --git a/es/utils/cos/ctyun.js b/es/utils/cos/ctyun.js
index a6be67f27..8efa1e89e 100644
--- a/es/utils/cos/ctyun.js
+++ b/es/utils/cos/ctyun.js
@@ -84,7 +84,7 @@ export default class CTYun {
                         : 0;
                     protocol2 = protocol[index];
                 }
-                return `${protocol2}://${domain}/${this.formKey(extraFile)}${style ? '?' + style : ''}`;
+                return `${protocol2}://${domain}/${this.formKey(extraFile)}${style ? style : ''}`;
             }
         }
         return '';
diff --git a/lib/utils/cos/ctyun.js b/lib/utils/cos/ctyun.js
index 79f20dd73..dd53e4090 100644
--- a/lib/utils/cos/ctyun.js
+++ b/lib/utils/cos/ctyun.js
@@ -86,7 +86,7 @@ class CTYun {
                         : 0;
                     protocol2 = protocol[index];
                 }
-                return `${protocol2}://${domain}/${this.formKey(extraFile)}${style ? '?' + style : ''}`;
+                return `${protocol2}://${domain}/${this.formKey(extraFile)}${style ? style : ''}`;
             }
         }
         return '';
diff --git a/src/utils/cos/ctyun.ts b/src/utils/cos/ctyun.ts
index f591a7054..cd34c7a3e 100644
--- a/src/utils/cos/ctyun.ts
+++ b/src/utils/cos/ctyun.ts
@@ -128,7 +128,7 @@ export default class CTYun implements Cos<ED, BRC, FRC> {
                         : 0;
                     protocol2 = protocol[index];
                 }
-                return `${protocol2}://${domain}/${this.formKey(extraFile)}${style ? '?' + style : ''}`;
+                return `${protocol2}://${domain}/${this.formKey(extraFile)}${style ? style : ''}`;
             }
         }
         return '';