Motor vehicle weighing device

The utility model relates to the technical field of motor vehicle weighing, and discloses a motor vehicle weighing device, both sides of a weighing wagon balance are provided with side slope seats, a cleaning sliding seat is movably installed on the side of the weighing wagon balance through a guide sliding column, and the cleaning sliding seat is driven by cooperation of a driving screw rod and a driving motor to move on the upper portion of the guide sliding column. The cleaning spray rod is rotatably arranged at the top of the cleaning sliding base through an adjusting rotary table, a movable cleaning mechanism is arranged on the side of the weighing wagon balance, the cleaning spray rod is arranged on the upper portion of the cleaning sliding base, the cleaning sliding base is guided and supported through a guiding sliding column, and sliding of the cleaning sliding base is driven through a motor lead screw structure. Full-automatic cleaning of the top plate of the weighing wagon balance can be achieved u