For large-scale and long-distance transportation of carbon dioxide, pipeline transportation is the most economical way, but the state of the medium in the pipeline will change due to the change of external conditions, which will lead to the change of its transportation difficulty and transportation economy. In order to study the properties and flow performance of carbon dioxide under different conditions, it is necessary to study the physical and chemical properties of carbon dioxide and analyze its pipeline flow characteristics under different conditions, so as to lay a foundation for better development of carbon dioxide gathering and transportation treatment.