Flame-retardant wear-resistant composite filter bag

The invention belongs to the field of filter bags, and particularly relates to a flame-retardant wear-resistant composite filter bag which comprises an outer bag mechanism and an inner bag mechanism which are combined and sleeved, an outer supporting rod is arranged outside an outer bag of the outer bag mechanism, an inner supporting column is arranged outside an inner bag of the inner bag mechanism, and the inner supporting column is located in a clamping gap between the outer bag and the inner bag; the rotating mechanism comprises a driving table arranged below the inner bag, a rotating disc and a supporting plate are arranged on the driving table, the supporting plate penetrates into an inner cavity of the inner bag, the outer bag is of a fixed structure, the inner bag is of a movable structure, and the inner bag is controlled by the rotating mechanism, can rotate in the inner cavity of the outer bag, is controlled by the lifting mechanism and can ascend and descend in the inner cavity of the outer bag. An