The invention discloses a flat-bottom lifting and positioning device. The flat-bottom lifting and positioning device comprises a flat-bottom parking lifting plate and a lifting and positioning structure arranged on the bottom surface of the flat-bottom parking lifting plate. The lifting and positioning structure comprises a base and a U-shaped lifting bracket arranged on the base, a vertical mounting supporting rod is fixed to the base, the bottom end of the U-shaped lifting bracket is welded and fixed to the base, the side surface of the U-shaped lifting bracket is fixed to the vertical mounting supporting rod through screws, and a lifting warped rod is arranged in the U-shaped lifting bracket. The middle part of the lifting warped rod is connected in the U-shaped lifting bracket througha shaft rod, a transverse pulling cylinder is fixed to the bottom of the U-shaped lifting bracket, a lifting seat is connected to the other end of the lifting warped rod, and the bottom surface of theflat-bottom parking lifting plate is connected to the top of the lifting seat through a rotating shaft rod. The flat-bottom lifting and positioning device has reasonable structural arrangement and convenient operation, can effectively and quickly realize the lifting and positioning operation of the flat-bottom parking lifting plate, ensures stable and reliable use, and has good use stability andhigh applicability.