The invention discloses an industrial air filtering machine, which comprises a shell, an air outlet, an air suction fan, a filtering main body and a rotator, wherein an upper cover is mounted at the upper end of the shell; the air outlet is connected with the shell through an auxiliary filtering box; a gauze screen is mounted inside the auxiliary filtering box; a dust discharging opening is fixedly arranged below the auxiliary filtering box; the air suction fan is connected with an driving motor; a filtering grid is mounted inside the filtering main body; a sliding plate is fixedly arranged on the filtering grid; further, the sliding plate is connected with a sliding rail; the rotator is connected with a supporting shaft. A cylindrical drum type filtering main body is adopted by the industrial air filtering machine; the industrial air filtering machine can drive the filtering grid to rotate to carry out multiple times of comprehensive filtering operation after meeting wind force, is high in work efficiency, is provided with the auxiliary filtering box and the gauge screen to carry out secondary filtration, can be used for guaranteeing that an effluent gas is pure, and is enabled to better carry out air filtering operation; one healthy and clean working environment is provided for an industrialized production worker.