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Shale gas, which is called "game changer" by energy circles, refers to the natural gas extracted from the underground shale interlayer, which is an important unconventional natural gas resource. It is not only a clean and efficient basic resource, but also an important chemical raw material. When H2S is contained in shale gas, it will not only form weak sulfuric acid corrosion pipeline and equipment with water in the process of mining, gathering and transportation, and purification, but also cause hydrogen bubble, stress corrosion cracking and hydrogen induced cracking in pipeline steel; when used as chemical raw materials, it will cause catalyst poisoning and affect the yield and quality of products.