Cleaning machine for heavy train with complex special-shaped curved surface

The invention relates to the technical field of cleaning equipment, in particular to a cleaning machine for a heavy train with a complex special-shaped curved surface, which comprises a movable portalframe, a top cleaning device, two side cleaning devices and a water spraying device, the portal frame comprises a first side mounting wall, a connecting wall and a second side mounting wall; the topcleaning device is installed on the inner side of the connecting wall and located on the lower portion of the connecting wall. The two side cleaning devices are installed on the inner side of the first side installation wall and the inner side of the second side installation wall respectively. The water pre-spraying device is fixed on the outer wall of the inlet end of the portal frame; the top cleaning device comprises a top mechanical arm brush and a top brush device; the top mechanical arm is slidably connected with the connecting wall; the top brush device comprises a first sliding plate,a second sliding plate, a t