Automatic cleaning device

The utility model discloses an automatic cleaning device which comprises a workbench and a cleaning groove fixedly formed in the top end of the workbench, a positioning jig is arranged in the cleaning groove, a driving motor for driving the positioning jig is arranged at the bottom of the positioning jig, and the bottom end of the driving motor is fixedly connected with the inner wall of the cleaning groove. A cleaning brush structure is arranged at the top of the positioning jig, an air cylinder for driving the position of the cleaning brush structure in the vertical direction is arranged at the top end of the cleaning brush structure, and a driving structure is arranged on one side of the air cylinder; the air cylinder works to push the cleaning brush to move downwards to make contact with the surface of a metal plate, the pressure of the cleaning brush on the surface of the metal plate can be controlled by controlling the moving distance of the air cylinder, then the electric push rod works to drive the cl