The invention relates to the field of medical treatment, in particular to a medical clinical surgical treatment assistant device in the orthopedics department. In view of the problem of delayed treatment time caused by pain intolerance of a patient during existing orthopaedic treatment, the following scheme is proposed. According to the technical scheme, the device includes a bottom plate, a sliding groove is formed in the bottom plate, the sliding groove is internally and slidably connected with a slider, the inner walls of the two sides of the sliding groove are connected with two symmetrically arranged guiding rods, the guiding rods penetrate through and are slidably connected with the slider, the circumferential side walls of the guiding rods are sleeved with reset springs, one ends ofthe springs are connected with the inner wall of the sliding groove, and the other ends of the reset springs are connected with the side wall of the slider. The patient can adjust the position of a seat according to his / her body shape, the legs of the patient can be effectively fixed, thus occurrence of secondary injuries of the patient in the treatment process can be avoided, meanwhile, the situation that the treatment time is delayed can be avoided, the treatment efficiency is improved, and the device is suitable for popularization.