North China power grid is mainly a thermal power system, so it is hard to meet increasing need of difference between peak and valley loads and the demand of peak-load regulation. Units peaking mode is directly related to the peaking economy, this paper set up a mode and appropriate economic assessment model for pumped storage and coal-fired power units two-shift peaking. Comprehensive consideration of pumped storage capacity and the factors influencing the load time, the evaluation method was proposed. The application indicates that the method is effective in a peaking cycle. The evaluation method can reasonably reflect the situation of the turbine peaking economy in the coal-fired power plants, and brings the benefits for pumped storage and 300MW coal-fired power units. It provides a reference for energy-saving dispatching. Pumped-storage and coal-fired power units can be used as basis for decision making of peaking shaving mode.