Corrosion is a key risk in the development of gas field with high CO2content and the production of gas treatment plant.In order to effectively control or mitigate corrosion, it is necessary to understand the corrosion types and related corrosion mechanism of gas field treatment plant with high CO2content.By finding out the corrosion cases of natural gas treatment plants with high CO2gas field, these corrosion phenomena are analyzed. At the same time, the mature theory of CO2corrosion of metals is used as a reference, and it is clear that there is CO2corrosion in this type of treatment plant, and there are other types of corrosionas well.It is very important to prevent, delay or control corrosion in this kind of gas field treatment plant.The result is of great significance for the corrosion prevention of gas treatment plant with high CO2.