Building formwork cleaning device

The invention discloses a building formwork cleaning device. The device comprises a lower mounting frame, a supporting rod and a hydraulic cylinder, wherein the lower mounting frame comprises a firstmounting groove and a first guide groove formed in the side edge of the first mounting groove, and a supporting plate is fixedly connected to the upper ends of a first guide block and a first moving block; the supporting rod is arranged on the side of the upper end of the lower mounting frame, and one end of a second lead screw is in transmission connection with the transmission end of a first driving motor; the hydraulic cylinder is arranged at the lower end of a second moving block, the movable end of the hydraulic cylinder is fixedly connected with a grinding machine cover, and the side edge of the lower end of the grinding machine cover is fixedly connected with one end of a dust suction pipe; and the other end of a collecting pipe is fixedly connected with one end of a connecting pipe, the other end of the co