The utility model discloses a converter coal gas double tower cooling and purification recovery system, this system be including the steelmaking converter that connects gradually, one -level evaporation cooling tower, second grade evaporation cooling tower, sack dirt ware, fan, switching war, switch the station and divide two tunnel outputs, all the way with diffuse the chimney and be connected, another way is connected through heat exchanger and gas chamber, the lower extreme of second grade evaporation cooling tower, sack dirt ware all is connected with thin grey storehouse, steelmaking converter, one -level evaporation cooling tower lower extreme all are connected with coarse ash bin. The utility model discloses a two levels of evaporation processes cools off tower series, carries out two -stage cooling, removes dust through the sack cleaner is further smart after removing dust again, can thoroughly solve the purified gas dustiness and exceed standard and convert iron stage chimney and the technical problem that exceeds standard in short -term and discharge appears, purifies dust content <= 10mgNm3.