Parking auxiliary device

The invention provides a parking auxiliary device comprising two parallel pre-embedded sliding ways arranged in a spaced mode. A connecting piece is connected to the bottoms of the pre-embedded sliding ways; the bottom of the connecting piece is fixedly connected with a pre-embedded plate; two trapezoidal sliding rails are embedded in the inner side of the top of each pre-embedded sliding way; the pre-embedded sliding ways and the trapezoidal sliding rails are slidably connected; vehicle carrying plates are arranged on the tops of the trapezoidal sliding rails; and a sliding frame is arranged between the trapezoidal sliding rails and the pre-embedded sliding ways; and the sliding frame slides in the length direction of the pre-embedded sliding ways. The cross section of each trapezoidal sliding rail is a trapezoid, each pre-embedded sliding way is a groove matched with the outline of the corresponding trapezoidal sliding rail, and the trapezoidal sliding rails are arranged inside the pre-embedded sliding ways