The tracked chassis is characterized in that: the outer shell of the wheel is equipped with an anti pulley, which is fixedly connected to the wheel through a locking buckle. The locking buckle is provided with several evenly distributed inner rings of the anti pulley, and the outer ring of the anti pulley is equipped with teeth. The track is equipped with a through hole that matches the teeth; The outer side of the wheel is equipped with a triangular support frame composed of a telescopic rod, and at the three vertices of the triangular support frame, there is a driven wheel shaft parallel to the wheel shaft. Each driven wheel shaft is hinged with a driven wheel, and the three driven wheels and anti slip wheels are all set on the track through an inscribed square.