The high-pressure water gun device makes the high-pressure piston pump generate high-pressure water to wash the surface of the object. The impact force of water is greater than the adhesion between dirt and the surface of the object, and the dirt is stripped and washed away by high-pressure water, thus realizing the cleaning device for cleaning the surface of the object. [1] Because the dirt is cleaned with a high-pressure water column, unless it is stubborn oil stains, a little detergent is needed, otherwise the foam generated by strong water pressure is enough to take away the general dirt.