It introduces the added drytype gas cleaning plant based on exist wettype gas cleaning plant in 4350m3 blast furnace of TISCO. It aims at the defects in the watersaving and environment protection of the wettype gas cleaning plant in superhuge type blast furnace. The drytype gas cleaning plant adopts efficient temperaturereducing equipment, insidefilter big bag dustremoval technology, perfectly designed drywet change technique and automation control. This system runs safety, reliable, and achieved remarkable results in watersaving. The dust content in gas after purification by drytype gas cleaning plant system is less than 3mg/m3. By comparison with the wettype gas cleaning plant, it not only improve the gas temperature, but also save 17Mt water per year. Generated energy of TRT increases 30%. The technology has achieved domestic advanced level.