diff --git a/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/message/request/MessageRequestProcessor.java b/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/message/request/MessageRequestProcessor.java
index c5658c3..04811cf 100644
--- a/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/message/request/MessageRequestProcessor.java
+++ b/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/message/request/MessageRequestProcessor.java
@@ -57,13 +57,11 @@ public class MessageRequestProcessor implements MessageProcessor {
         MessageDTO messageDto = XmlUtils.parse(content, MessageDTO.class, GB28181Constant.CHARSET);
         log.debug("deviceId:{}, 接收到的消息 => {}", deviceId, messageDto);
 
-        Response response = null;
         if(messageDto.getCmdType().equalsIgnoreCase(CmdType.CATALOG)) {
+            sender.send(senderIp, okResponse(request));
             catalogCmdProcessor.process(request, content);
         } else {
-            response = SipResponseBuilder.response(request, Response.NOT_IMPLEMENTED, ResponseStatus.NOT_IMPLEMENTED.getMessage());
-        }
-        if(response != null){
+            Response response = SipResponseBuilder.response(request, Response.NOT_IMPLEMENTED, ResponseStatus.NOT_IMPLEMENTED.getMessage());
             sender.send(senderIp, response);
         }
     }
diff --git a/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/message/request/catalog/CatalogCmdProcessor.java b/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/message/request/catalog/CatalogCmdProcessor.java
index b1bcf98..c9c3e28 100644
--- a/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/message/request/catalog/CatalogCmdProcessor.java
+++ b/gb28181-mocking-service/src/main/java/cn/skcks/docking/gb28181/mocking/core/sip/message/processor/message/request/catalog/CatalogCmdProcessor.java
@@ -50,13 +50,11 @@ public class CatalogCmdProcessor {
                 .sumNum(Long.valueOf(catalogDeviceListDTO.getNum()))
                 .build();
 
-        long cSeq = request.getCSeq().getSeqNumber() + 1;
         FromHeader fromHeader = request.getFromHeader();
-
         sender.sendRequest((provider, ip, port)->{
             CallIdHeader callIdHeader = provider.getNewCallId();
             return SipRequestBuilder.createMessageRequest(mockingDevice,
-                    ip, port, cSeq, XmlUtils.toXml(catalogResponseDTO), fromHeader.getTag(), callIdHeader);
+                    ip, port, 1, XmlUtils.toXml(catalogResponseDTO), fromHeader.getTag(), callIdHeader);
         });
     }
 }