The invention discloses a cleaning device with a quantitative automatic cleaning function for an industrial mechanical part. A rotating rod is rotationally connected to the upper end of a rotating disc, a hinge rod is fixedly connected to the side wall of the rotating rod, the other end of the hinge rod is hinged to the side wall of a push rod, and the other end of the push rod sequentially penetrates through the side wall of a cleaning frame and the side wall of a water storage tank and extends into a pressure box; and meanwhile, and the rotation of the rotary disc can also push the push rodto move through the hinge rod, the movement of the push rod pushes a piston to move in the pressure box, the piston pushes a sealing plate to enter a sealing groove, and under the pushing of the piston, water in the pressure box is sprayed out from a spray head through a water pipe, so that the effect of saving water resources is achieved; and the device not only can achieve the effect of high-efficiency working, but also can achieve the effect of saving resources.