diff --git a/rc-service/rc-service-other/other-application/src/main/java/com/red/circle/other/app/command/user/ProcessCpApplyCmd.java b/rc-service/rc-service-other/other-application/src/main/java/com/red/circle/other/app/command/user/ProcessCpApplyCmd.java
index 6f5d41b2..1ff3698c 100644
--- a/rc-service/rc-service-other/other-application/src/main/java/com/red/circle/other/app/command/user/ProcessCpApplyCmd.java
+++ b/rc-service/rc-service-other/other-application/src/main/java/com/red/circle/other/app/command/user/ProcessCpApplyCmd.java
@@ -70,6 +70,12 @@ public class ProcessCpApplyCmd {
       // 非复合申请：CP已存在
       ResponseAssert.isFalse(UserRelationErrorCode.ME_OR_YOU_CP_EXISTED,
           cpRelationshipService.existsCp(cpApply.getSendApplyUserId(), cpApply.getAcceptApplyUserId()));
+
+      // 检查CP数量限制（最多4个）
+      int senderCpCount = cpRelationshipService.countNormalCp(cmd.requiredReqUserId());
+      int receiverCpCount = cpRelationshipService.countNormalCp(cpApply.getAcceptApplyUserId());
+      ResponseAssert.isFalse(UserRelationErrorCode.CP_LIMIT_EXCEEDED, senderCpCount >= 4);
+      ResponseAssert.isFalse(UserRelationErrorCode.CP_LIMIT_EXCEEDED, receiverCpCount >= 4);
     }
 
     // 操作失败