Lumbar traction device driven by pneumatic muscles

The invention relates to a lumbar traction device driven by pneumatic muscles. The lumbar traction device comprises an upper limb fixing frame and a waist fixing frame, wherein a rotating shaft is connected to the upper limb fixing frame, and is arranged on the waist fixing frame in an inserting manner; a crotch binding belt is connected to the waist fixing frame; and a plurality of pneumatic muscles are connected to the upper limb fixing frame, and are connected with a shoulder binding belt. According to the lumbar traction device disclosed by the invention, the pneumatic muscles are synchronously inflated and shortened in the direction away from the waist fixing frame, so that the shoulder binding belt and the crotch binding belt can cooperate to perform stretching and traction on a human body; a flexible steel wire is arranged on the rotating shaft in a sleeving manner, and is twined on the rotating shaft spirally; the pneumatic muscles and tension springs are connected to the waistfixing frame; one of the