Abstract: The associated gas in the 12th district of Tahe oilfield containing highe level of H2S, CO2 and H2O is a severe corrosive environment. On the basis of corrosive environment and anticorrosion technology research, corrosion resistant materials were elected, corrosion inhibitors were applied, and corrosion monitoring network was built. Comprehensive anticorrosion technology minimised the corrosion risk of associated gas pipe and provided technical reference for such pipelines.