Abstract: The discussion involves such issues as the mechanism of CO₂ corrosion and factors related to this kind of corrosion in the petroleum and natural gas industry, the effects against the corrosion by alloy elements and relevant heat treatment schedules and domestic and overseas progresses in research on protective measures against the corrosion like development of Cr corrosion-resistant material, corrosion inhibitor and anticorrosive paint, etc. Also involved here in the paper is the technical preparation and consideration by Pangang Group Chengdu I & S Co., Ltd. related to developing anti-CO₂ corrosion casing with its own equipment advantages.