Chassis system and highway-railway dual-purpose vehicle

The embodiment of the utility model provides a chassis system and a highway-railway dual-purpose vehicle. The chassis system comprises a frame, a driving system and a side guide device. The utility model relates to a rail-crossing vehicle which comprises a vehicle frame, two drive axles and four wheels, the two drive axles are connected to the bottom of the vehicle frame at intervals, the two ends of each drive axle are connected with the wheels, and the distance between a pair of wheels located on the same drive axle is larger than the width of a rail, so that the wheels can cross the rail to run on a rail plate. The side guide devices are arranged on the left side and the right side of the frame, each side guide device comprises a lifting assembly and a guide wheel, and the guide wheels are connected to the frame in a lifting mode through the lifting assemblies so that the guide wheels can descend to be matched with the outer side faces of the track plates or can be lifted to be separated from the track pla