Self-propelled combined vehicle and multifunctional trailer thereof

The utility model discloses a multifunctional trailer which comprises a trailer body, a left wheel, a right wheel and an external connector, wherein the left wheel and the right wheel are rotatably assembled on the trailer body, and the external connector is assembled on the trailer body. The trailer body is provided with a containing cavity, the external connector is arranged on the lower portion or the front portion of the trailer body in a protruding mode, and the external connector is configured to be used for being directly or indirectly connected with a bicycle in an assembled mode, so that the multifunctional trailer can be dragged by the bicycle to walk. Therefore, the riding pleasure of the user is met, and the waiting time of short-distance leisure, shopping and camping is shortened. In addition, the utility model further discloses a self-propelled combined vehicle. 本实用新型公开了一种多功能拖车，包含车体、可转动地装配于所述车体的左车轮和右车轮及装配于所述车体的外接接头。所述车体具有一收容腔，所述外接接头凸设于所述车体的下方或前方，所述外接接头被配置为用于与一自行车直接或间接的装配连接，从而可由该自行车拖动所述多功能拖车行走；以满