The invention discloses a disused bandage crushing device. The device comprises a machine body, the top of the right side of the machine body is fixedly connected with a first motor through a supportplate, an output shaft of the first motor is fixedly connected with a driving gear, the surface of the driving gear is meshed with a driven gear, and a first rotating rod is welded to the axle centerof the left side of the driving gear. The device achieves the effect of crushing disused bandages through the cooperation of the first motor, the driving gear, the driven gear, the first rotating rodand a second rotating rod, through the cooperation of a telescopic rod, a sieve plate, a screen, a spring, a transverse plate, a second motor, a swinging rod, a turntable, a movable belt, a rotating wheel, a rotating shaft and a vertical plate, the effect of screening the disused bandages is achieved, thereby performing the effect of secondary crushing and achieving the advantage of good crushingeffect on the bandages, and convenience is brought to the work of medical staff, which helps to improve the environment.