The utility model discloses a filter that is used for coal gasification equipment high temperature including under sulphur environment, it includes the casing, the casing is formed with the cavity space, is provided with air inlet and gas outlet on the lateral wall of casing and top cap respectively, the tube sheet is located the top of air inlet, and the circumference edge of tube sheet is connected with the lateral wall of casing is inboard, division has a plurality of first through -holes on the tube sheet, multiunit filtering component, one -to -one install in a plurality of first through -hole departments, and a plurality of filtration filter cores that filtering component contains are located the dust -laden space and all are formed with the cavity, the top end opening and clean space intercommunication of cavity through filtering the filter core, with the blowback regenerating unit who has the mouth of blowing for carry blowback gas to the clean space in by the casing is outer, the mouth of blowing sets up in first through -hole top and just to first through -hole, filter the filter core and filter the filter core for the fe3Al alloy. The utility model discloses an above -mentioned technical scheme has improved the life who filters the filter core, has guaranteed the continuous steady operation of whole coal gasification equipment long period.