The optimal scheduling strategy of photovoltaic-energy storage hybrid system is an important guarantee for the economic and safe operation of photovoltaic-energy storage hybrid system,but the traditional economic dispatch models do not consider the effective management of the battery energy storage station (BESS)'s internal battery.An economic optimal scheduling strategy of photovoltaic-energy storage hybrid system is put forward,and a mathematics model of economic optimal scheduling is established by taken the lowest total cost a day as optimization objectives and using the power balancing,state of charge,power limit and scheduling cycle as constraint conditions,according to performance parameters and operating conditions of each battery pack.Improved particle swarm optimization (IPSO) algorithm is applied to solve the mathematics model.Finally,the simulation result proved that the improved particle swarm optimization algorithm is superior and the scheduling strategy is proper in the application of photovoltaic-energy storage hybrid system.