The invention provides a mobile waist follow-up device, which comprises a mobile stand, a waist gravity center adjusting unit and a waist moving unit. The waist gravity center adjusting unit is capable of adjusting the gravity center of a human body up and down, and the waist gravity center adjusting unit mainly comprises a gear motor, bevel gears, a screw-nut pair, sliding rails/sliding blocks, moving plates, a horizontal bracket and the like; an output shaft of the gear motor is connected to the small bevel gear and is used for driving the big bevel gear which is fixedly connected to a screw lead to rotate; a nut is fixedly connected on the rear moving plate; the horizontal bracket is fixedly connected to the moving plates and is capable of moving up and down along the moving plates; and according to the waist moving unit, a waist supporting plate is rotated along the axial line of waist by virtue of a telescopic electric cylinder, so that a bending action of the waist is achieved. The mobile waist follow-up device provided by the invention is compact in structure, and the mobile waist follow-up device has two rehabilitation training modes, namely waist gravity center adjusting and bending & squatting, so that the requirements of a series of squatting rehabilitation training of a patient including walking upright, bending & squatting, squatting & fetching, squatting & lacing up shoes and the like is achieved.