Suction device of crane

The utility model relates to the technical field of aluminum electrolysis auxiliary tools, and provides a crane material suction device which comprises a dust suction device connected with a material suction nozzle through a material suction pipe, and further comprises a material pipe fixing piece used for fixing the material suction pipe. The deflection mechanism comprises a connecting box, a deflection shaft and a deflection driving element, the deflection shaft is rotationally arranged in the connecting box and is perpendicular to the vertical direction, the top of the material pipe fixing part is fixedly connected with the deflection shaft, and the output end of the deflection driving element is connected with the deflection shaft; the rotating mechanism comprises a mounting box, a rotating shaft and a rotating driving element, the rotating shaft is fixedly connected to the top of the connecting box, and the output end of the rotating driving element is connected with the top end of the rotating shaft; an