Abstract: In order to reduce greenhouse gas emissions, a carbon capture system for coal-fired units coupled with molten salt energy storage has been established to improve the performance of power plants and reduce carbon emissions.Under the storage condition, the low-temperature molten salt was heated by steam after reheating and provided energy for the regeneration of ethanolamine solution (MEA) in the reboiler. Under the energy release condition, the high-temperature molten salt was used to heat the return water, and the regeneration energy of the ethanolamine solution was supplied by the exhaust steam from the medium-pressure cylinder. A thermal simulation model was constructed on the basis of the Ebsilon software, and the thermal performance of the coupled system and the prediction of the carbon emission were analyzed. The results showed that the plant-wide thermal efficiency of the coupled molten salt energy storage carbon capture system under 75% THA condition was increased by 3.14 percentage point compared with the traditional carbon capture unit under the same load, and the atmospheric CO₂ emission was reduced by 82.34 t/h compared with that of the coal-fired unit alone. The output power reduction of the energy release process unit is less than that of the energy storage condition. When the carbon capture rate is 95%, the output power variation of the energy storage process unit accounts for 34.99% of the rated load, while the output power variation of the energy release process unit accounts for 6.68% of the rated load. The introduction of energy storage systems and carbon capture systems allows traditional coal-fired power plants to achieve CO₂ capture while ensuring their functional capabilities, significantly reducing atmospheric CO₂ emissions.