diff --git a/uniCloud/database/uni-im-group-member.schema.json b/uniCloud/database/uni-im-group-member.schema.json
index dee3384f062211ff6d7b8f127344a720cbb5321a..34168cd3962d40bfeb9091d0cb9d84d20797186c 100644
--- a/uniCloud/database/uni-im-group-member.schema.json
+++ b/uniCloud/database/uni-im-group-member.schema.json
@@ -48,6 +48,10 @@
 			"forceDefaultValue": {
 				"$env": "now"
 			}
-		}
+		},
+    "active_time": {
+      "bsonType": "timestamp",
+      "description": "活跃时间（最后一场发消息时间）"
+    }
 	}
 }
\ No newline at end of file