The utility model belongs to the technical field of vehicle-mounted soil scrubbing, and particularly relates to a vehicle-mounted soil scrubbing device which comprises a bottom plate, universal wheels are fixedly installed at the positions, close to the four corners, of the bottom of the bottom plate, a storage shell is fixedly installed at the top of the bottom plate, and a rotating door is rotatably installed on one side of the storage shell. Two electric push rods are fixedly installed on the other side of the storage shell, the output ends of the electric push rods penetrate through the other side of the storage shell and are fixedly provided with the same scraping plate, a connecting plate is fixedly installed on one side of the scraping plate, a convex plate is fixedly installed on one side of the connecting plate, a baffle is installed on the convex plate in an inserted mode, and a U-shaped groove is formed in the connecting plate; when the whole device is used, it is ensured that residual soil on the inner wall of the storage shell can be automatically flushed, manual cleaning by workers is not needed, use is more convenient, and time is saved.