The invention discloses a shoe bottom cleaning device. The device comprises a shell, transverse rods, a conveyor belt, hairbrushes, a motor, belt pulleys, a belt, spray heads, water inlet pipes, a water outlet pipe, electromagnetic valves, a single chip microcomputer, a triggering switch and a water supply tank, wherein the conveyor belt is connected with the motor through the belt pulleys and thebelt; the spray heads are obliquely arranged on the parts, among the transverse rods and the conveyor belt, on the left and right sides of the shell; the single chip microcomputer is electrically connected with the motor, the electromagnetic valves and the triggering switch; the triggering switch is installed below the transverse rods; the water supply tank is formed in the position, close to theleft side, in the shell, the two rows of hairbrushes are arranged on the conveyor belt to form a double helix shape; the hairbrushes are in contact with water in the water supply tank when verticallyfacing down. Different from the prior art, the device has the advantages that the hairbrushes are arranged by adopting the double helix mode, so that things in lines of the shoe bottom can be effectively cleaned away when the hairbrushes are driven by the conveyor belt to clean the shoe bottom; meanwhile, automation is achieved, and water is saved when the device is in use; the overall structureis simple, and the practicability is high.