Building waterproof maintenance supporting device

The utility model discloses a building waterproof maintenance supporting device which comprises a bottom plate, stand columns and pedals, idler wheels are movably installed on the lower surface of the bottom plate close to the four corners, the stand columns are fixedly installed on the upper surface of the bottom plate close to the four corners, the surfaces of the stand columns are sleeved with the pedals, and scraping and sweeping rods are movably installed on the upper surfaces of the pedals. And positioning sleeves are arranged on the surfaces of the stand columns and located above and below the pedal in a sleeving mode, and first supporting frames are movably installed on the two sides, close to one end, of the upper surface of the bottom plate. According to the building waterproof maintenance supporting device, through the arranged scraping and sweeping rod, after maintenance is finished, the scraping and sweeping rod is moved, in the moving process of the scraping and sweeping rod, the sweeping block