The CO2 corrosion of water-containing oil pipelines is serious. It is of great significance to reveal the corrosion mechanism and predict the corrosion rate for corrosion prediction and protection. Based on the study of corrosion mechanism, the prediction mechanism model of CO2 corrosion rate is established, which has clear physical meaning and wide application range. In this paper, the research progress of CO2 corrosion mechanism model of pipeline steel at home and abroad is reviewed from four aspects related to corrosion rate prediction: chemical equilibrium reaction, corrosion film formation, corrosion electrochemical reaction and transport processes. It is suggested that: ①Investigate the effect of carbonate in solution on the kinetics and mechanism of anodic dissolution reaction of inner wall of steel pipe. ②Analyze the composition, structure, electrochemical properties, mechanical properties and diffusion coefficient of ions through the porous film of CO2 corrosion film formed on the metal surface under different working conditions. ③Develop experiments in complex acid medium to clarify the synergistic corrosion mechanism of H2S/Cl-/CO2, and establish the mathematical model of multi-factor corrosion prediction. ④Study the effects of wettability of crude oil and oil-water ratio on corrosion characteristics of oil water interface and physical and chemical parameters of the medium from the perspective of multi-field coupling, so as to provide theoretical and technical support for the prevention and prediction of CO2 corrosion in water-containing oil pipelines.