Abstract: In view of the increasingly serious corrosion problem of H₂S and CO₂ in oil and gas tubing, the corrosion process of oil and gas tubing under the condition of H₂S alone, CO₂ alone and coexistence of H₂S and CO₂ is reviewed in detail. The characteristics and advantages and limitations in practical engineering application of protection measures such as corrosion resistant pipe, corrosion inhibitor, electrochemical protection technology and pipeline inner coating technology are expounded under the condition of coexistence of H₂S and CO₂.