Abstract: A coal-fired unit coupled with a molten salt energy storage carbon capture system was proposed to reduce greenhouse gas 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 4.14% 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 reduction of unit output power in the process of energy release was lower than that of the unit under the storage condition. The lowest reduction of the unit output power in the storage process was 34.99 MW, and 6.68 MW in the energy release process. The introduction of the energy storage system and carbon capture system would enable the traditional coal-fired power plant to realize CO₂ capture on the basis of guaranteeing the work capacity, and significantly reduce the atmospheric CO₂ emissions.