diff --git a/game-server/app/services/checkParam.ts b/game-server/app/services/checkParam.ts
index 969e129ef..aa12be726 100644
--- a/game-server/app/services/checkParam.ts
+++ b/game-server/app/services/checkParam.ts
@@ -760,7 +760,12 @@ export function checkRouteParam(route: string, msg: any) {
             {
                 let { channel, type, content, targetRoleId, targetMsgCode} = msg;
                 if(!checkNaturalNumbers(type) || !checkIsInEnum(MSG_TYPE, type)) return false;
-                if(!checkNaturalStrings(channel, content)) return false;
+                if(!checkNaturalStrings(channel)) return false;
+                if(type == MSG_TYPE.IMG) {
+                    if(!checkNaturalNumbers(content)) return false;
+                } else {
+                    if(!checkNaturalStrings(content)) return false;
+                }
                 if(!checkStringIfExist(targetRoleId, targetMsgCode)) return false;
                 break;
             }
@@ -768,7 +773,11 @@ export function checkRouteParam(route: string, msg: any) {
             {
                 let { type, content, targetRoleId, targetMsgCode} = msg;
                 if(!checkNaturalNumbers(type) || !checkIsInEnum(MSG_TYPE, type)) return false;
-                if(!checkNaturalStrings(content)) return false;
+                if(type == MSG_TYPE.IMG) {
+                    if(!checkNaturalNumbers(content)) return false;
+                } else {
+                    if(!checkNaturalStrings(content)) return false;
+                }
                 if(!checkStringIfExist(targetRoleId, targetMsgCode)) return false;
                 break;
             }