The triangular track chassis has good travel and steering capabilities. The tracks are in contact with the ground, and the drive wheels are not in contact with the ground. When the motor drives the drive wheel to rotate, the drive wheel continuously rolls up the track from the rear through the meshing between the teeth on the drive wheel and the track chain under the action of the reducer driving torque. The grounded part of the track exerts a backward force on the ground, and the ground correspondingly exerts a forward reaction force on the track, which is the driving force that drives the machine forward. When the driving force is sufficient to overcome walking resistance, the supporting wheels roll forward on the surface of the track, causing the machine to move forward. The front and rear tracks of the entire machine's track walking mechanism can be turned separately, resulting in a smaller turning radius.