The walking system is composed of walking device, walking control box, hydraulic pipeline and HPU. The control Box and HPU can be hung on the outside of the base, walking with the rig. It can be integrated into the base of substructure or hung on both ends of the substructure. It can be moved in multi-directions (every 15°) and rotate around the well center. Double roller chain structure is adopted, which can reduce the specific pressure to the ground and operate safely. The rotary support structure is adopted to make reversing operation easy. Walking with the drilling tools meet the cluster well operation requirement.