an automatic cleaning machine for wall plates is disclosed . multiple long axial tracks with the same direction are fixed in a parallel and array pivoted way on the circumference or the plate face of the object to be cleaned . water - guiding pipes are formed on the long axial tracks which are provided with electric rails , and multiple magnetic valves are provided on the pipe walls of the water - guiding pipes in a spaced way . the long axial tracks are provided with sliding frames . the sliding frames are provided with conducting brackets corresponding to the electric rails , and provided with long axial magnetic - attracted bodies opposed to the magnetic valves to turn on or off the cleaning water with a magnetic force . brush drive mechanisms are provided on the sliding frames , and the shaft levers of the brush drive mechanisms are arranged in a direction normal to the long axial tracks and combined with long axial brushes to scrub wall plates . cover plates are provided outside the long axial brushes . the automatic cleaning machine can be used for cleaning the plate faces of external walls , glasses and solar panels .