Lifting frame for maintenance of large automobile

The utility model discloses a lifting frame for large automobile maintenance, which belongs to the field of automobile maintenance lifting frames, and comprises a concrete base layer, two groups of fixing frames are symmetrically mounted on the inner side wall of the concrete base layer, a motor is mounted at the top of each fixing frame, and a motor is mounted on the inner side wall of the concrete base layer. The two sets of motors are symmetrically installed at the top of the fixing frame, and threaded rods are installed at the output ends of the motors and penetrate through the outer side wall of the top of the fixing frame. According to the vehicle bottom maintenance device disclosed by the utility model, the concrete base layer, the motor, the fixed frame, the bearing, the threaded rod, the threaded sleeve, the limiting groove, the connecting rod and the bearing plate are matched with one another, so that the bottom of a vehicle is conveniently maintained, and the practicability of the device is improve