The utility model discloses a car side wall hoisting accessory that can overturn, including the shape of falling L gallows and hoist subassembly, the horizontal portion of the shape of falling L gallows is provided with the lug, and the lower extreme of the vertical portion of the shape of falling L gallows is provided with the motor, and the transmission is connected with the worm on the motor shaft of motor, and the bottom slope of the vertical portion of the shape of falling L gallows is provided with the connecting rod, and the connecting rod has the worm wheel with worm engaged with through round pin axle hinge, and the worm wheel links firmly through connecting plate and hoist subassembly mutually, the hoist subassembly includes the jib that links firmly mutually with the worm wheel, the both ends of jib all are provided with L shape hoist, are provided with the buffer block on the L shape hoist. The utility model has the advantage of simple structure, convenient operation improves production efficiency, adopt worm gear pair, 90 upsets can take place for the hoist subassembly, and then make the side wall take place the upset, satisfy the operation demand, and the worm gear pair meshing is tight, has the positioning action, lift by crane the in -process and can avoid car side wall and welding jig collision, and then ensure the side wall quality.