Material returning device of instrument lathe

The utility model discloses a material returning device of an instrument lathe, and relates to the technical field of lathe material returning devices, the material returning device comprises a base, a side plate and a main shaft motor, the output end of the main shaft motor is provided with a mounting cylinder extending to the other end of the side plate, a second air cylinder is mounted in the mounting cylinder, and the output end of the second air cylinder is provided with a supporting plate; a first air cylinder is mounted at the end, close to the spindle motor, of the side plate, and a movable guide seat slidably connected with the base is arranged at the output end of the first air cylinder. Under the action of the first air cylinder and the second air cylinder, the movable guide seat and the supporting plate are driven to move respectively, so that the supporting plate pushes a workpiece in the axial direction of the mounting barrel, the workpiece falls into the movable guide seat and slowly falls down