Multiple-threaded screw pair lifting mechanical stereoscopic parking device

The utility model provides a multiple-threaded screw pair lifting mechanical stereoscopic parking device which comprises an installation baseboard, a base, screws, a cushion, a car loading plate, a screw pair and a speed-reduction motor. The speed-reduction motor which is connected with the screws is installed at the top of the screw pair, the screws are connected with the car loading plate through the screw pair, and the screw pair and the screws are connected with the base. When a car at the first layer is taken out, the motor does not need starting, and the car can be driven out directly. When a car at the second layer is taken out, the car at the first layer needs driving out, then a second-layer parking button is pressed, the speed-reduction motor drives the screws to rotate, the screws drive the screw pair to work, the screw pair drives the car loading plate to decline, when the car loading plate declines to the lowest position, a limit switch automatically powers off and stops, and then the car can be