The track chassis is characterized in that: the wheels are covered with anti pulleys, which are fixedly connected to the wheels through locking buckles. The locking buckles are provided with several and evenly distributed on the inner ring of the anti pulleys, and the outer ring of the anti pulleys is provided with gear teeth. The track is provided with through holes that match the gear teeth; The outer side of the wheel is equipped with a triangular support frame composed of telescopic rods. At the three vertices of the triangular support frame, there is a driven wheel axle arranged parallel to the wheel axis. Each driven wheel axle is hinged with a driven wheel. The three driven wheels and anti-skid wheels are all arranged on the track by internal cutting.