Filtering device for safety air bag generator

The utility model relates to the technical field of air bag impurity filtering, in particular to a filtering device for a safety air bag generator. The device comprises an outer sleeve and a blocking device arranged in the outer sleeve and used for blocking sundries, the outer sleeve comprises an outer pipe, the blocking device comprises an inner pipe and a plurality of ventilation buckles annularly arranged on the side wall of the inner pipe, arc-shaped supporting rods are fixed to the four corners in the ventilation buckles, and one ends of the supporting rods are close to one another. The filter screen is supported by the supporting rods, so that when the filter screen bears impact of a large number of impurities at a time, the supporting rods support the filter screen, the shape of the filter screen is not changed, and normal circulation of gas is guaranteed; the contact surface of the filter screen and the impurities is arc-shaped, so that the impurities blocked by the filter screen can be conveniently g