Seabed mining vehicle underpan, seabed mining vehicle and controlling method for seabed mining vehicle

The invention relates to a seabed mining vehicle underpan, a seabed mining vehicle and a controlling method for the seabed mining vehicle. The mining vehicle underpan comprises four electric-driving type caterpillar band walking mechanisms, four hanging mechanisms, an underpan frame and an underpan control system, the four electric-driving type caterpillar band walking mechanisms are mounted on the four hanging mechanisms correspondingly, and each electric-driving type caterpillar band walking mechanism is mounted on a bearing rod of the corresponding hanging mechanism through a caterpillar band frame; the bearing rods are connected with a steering lever through nuts and screw rods, and the inner ends of the steering levers are connected with hanging seats of the underpan frame through sliding bearings; and the underpan control system which is mounted on the underpan frame comprises an electronic bin, an acoustic beacon and an inertial navigation assembly. When the seabed mining vehicle is in the running proc