H3S in coal gas is removed with HPF method in desulfurizing process, i.e., distilled ammo- nia from No.2 work zone of purification workshop in our coking branch company is used as alkali source, the desulfurizing process is wet oxidizing process with 888 compound catalyst. The method can remove not only H..S but also most of HCN and some of organic sulfur. This method has high desulfurizing efficiency and doesn＇t need additional alkali source. Salt in circulating solution is less and not easy to accumulate so that salt extracting facility is not needed. Waste solution is less and al- so be added to coal for coking. The method is characterized by stable running and good enviroumen- tal effect and high regenerative efficiency and smooth operation.