The invention discloses an automobile shell repair machine which comprises a fixed seat and a rack arranged above the fixed seat, wherein a rotary rack body, a central rotary shaft and a fixed rack are successively arranged from top to bottom in the rack; a working cavity is formed in the rotary rack; a pushing device is arranged in the working cavity; an adjusting threaded rod is arranged on theleft side of the pushing device; the left end of the adjusting threaded rod is matched with and connected to the inner wall of the rack; the right side of the adjusting threaded rod is matched with ahollow movable plate; a hollow movable arm is fixedly arranged in the center of the right side of the hollow movable plate; and a plastic compression bag is fixedly arranged at the right end of the hollow movable arm. The automobile shell repair machine disclosed by the invention is simple in structure, convenient to operate and suitable for the surfaces of most automobile shells in the market without high repair charge in 4S shop, so that the input cost and the maintenance cost of the user are lowered. The user can be liberated from a dilemma that the automobile shell is damaged and the userdoes not want to pay expensive maintenance cost, and great convenience is provided for wide car-loving persons.