Majiagou geologic formation in Erdos Carbon Capture and Storage (CCS) demonstration project is chosen as artificial geothermal reservoir, the simulation software of TOUGH2 is used to create numerical models of Enhanced Geothermal System (EGS) in which CO₂ is heat transfer carrier. In order to analyze the impact of CO₂ injection temperatures on heat extraction rate and the sustainability of CO₂-EGS, five cases with different CO₂ injection temperatures ranged from 18℃ to 42℃ are designed. Simulation results show that the range of the average heat extraction rate for those five cases is 6.56～8.47MW in the entire period of CO₂-EGS operation. The heat extraction rates vary over time and the rate is 6.37～7.9MW in the stage of CO₂ and water displacement and the rate is 6.64～8.68MW after aqueous phase disappear, respectively. In whole process of CO₂-EGS, the temperature of production fluid decreases with a rate of 1.89～1.74℃/a and the system sustainable time is 10.58～11.49a. Injection temperature of CO₂ significantly impacts the heat extraction rate of EGS; however has a little impact on the sustainability of CO₂-EGS. Reducing CO₂ injection temperature in the range permitted by the CO₂-EGS operation is a good choice for CO₂-EGS. Those results could provide the reference for the geological storage and resource utilization of CO₂.