The bottom of the base is provided with a walking mechanism, the lifting part comprises a contraction state and an elongation state, the lifting part makes the seat cushion in a horizontal state when the shrinkage state, the lifting part makes the seat cushion in a vertical state when the elongation state, and the base adopts a frame structure with a through hole in the middle part. The patient can be assisted to change from sitting posture to standing posture through the rising movement of the lifting mechanism, and the patient can also actively and passively walk through the walking mechanism, which greatly facilitates the patient's self-rehabilitation exercise, and has the characteristics of simple structure and convenient use.