Hydrogen sulfide is widely present in various links such as natural gas extraction, storage and transportation, and liquefaction. The hydrogen sulfate formed by hydrogen sulfide in contact with water causes great corrosion to metal pipelines and equipment. The presence of O2 and CO2 accelerates corrosion, and in severe cases, it can cause catastrophic accidents. Therefore, strict control of hydrogen sulfide content in natural gas (generally ≤ 20ppm) is of great significance to reduce harm to personnel and damage to equipment environment. Portable natural gas hydrogen sulfide analyzer uses "full spectrum" ultraviolet visible diode array detector to detect H2S components, and the instrument is suitable for natural gas pipeline transportation, storage and transportation, processing plants, liquefaction plants and other occasions.