In view of the ever-increasing pumped storage power station capacity in the East China Grid， an overall consideration is made of the expected load， the interconnection plan， the power generation capacity， plant operating characteristics and other factors. In order to maximize the energy efficiency and enhance the thermal power generation group load factor， this paper puts forward an optimization algorithm based on the actual situation， with the maximum power generation load factor of the entire network set as the optimization objective. In practical applications， based on this optimization algorithm， a computer procedure has been developed for the East China Grid to provide the decision basis of the energy schedule. Test results show that the computer procedure has greatly improved the quality and efficiency of the energy schedule of the pumped-storage power stations in the East China Grid.