For natural gas well in sour gas reservoirs, very serious corrosion in the well producing system is an important factor of gas production system life. In order to ensure the long - term development of gas wells, this paper mainly introduces material corrosion prevention technology in the well producing system, such as c orrosion - resistant alloy steel corrosion control technology , c orrosion inhibitor technology and so on. By tak ing YB - L Gas Field as an example, which is a typical sulfide containing gas field , s tatistics generated from the natural gas analytical data of gas wells at YB - L Gas Field shows that the content of hydrogen sulfide is 8. 3 % ～ 10. 2 % , with the average of 9.4%, and t he content of carbon dioxide is generally 4. 6 % ～ 8 . 9 %, with the average of 6 . 5 %. The average relative density of natural gas is 0.67 6 . It can be observed from the above that YB - L gas reservoirs is a typical sulfide containing gas field under adverse corrosion environments. T his paper introduces the material corrosion prevention technology and c orrosion inhibitor technology in the well producing system in YB - L Gas Field. For application in the well producing system in YB - L Gas Field, the technology above have good performance of corrosion resistance.