Under the“double carbon”target, pumped storage will bring new opportunities to participate in carbon trading market.Combined with the existing Chinese certified emission reduction project methodology in the electric power industry, a quantitative model for carbon emission reduction of pumped storage based on emission factor method is established. Firstly, the existing CCER projects in the power industry are investigated, and the key elements of the methodology and calculation criteria of CCER projects are analyzed. Then, based on the carbon emission reduction mechanism of pumped storage during pumping period and peak load period, a quantitative carbon emission reduction model of pumped storage project is constructed. Finally, based on the analysis of a regional power grid,the carbon emission reduction of pumped storage is calculated. Examples analysis shows that the model can effectively calculate the carbon emission reduction of pumped storage, and the carbon emission reduction benefit is significant.