Abstract: Benefits are generated through load shifting and basic electricity charge saving with the allocation of energy storage on customer-side.As the unit cost of energy storage decreases,the balance of peak-valley price will be broken.On the basis of the analysis of the power grid company’s benefits impact from customer-side energy storage allocation,this paper establishes a dynamic interaction model between peak-valley electricity price and customer-side energy storage cost,formulates dynamic adjustment strategies for peak-valley price and calculates the appropriate scale for customer-side energy storage.The instance testifies the effectiveness and preciseness of this model.The research provides a certain reference value for energy and price department in leading a reasonable development of customer-side energy storage and building a dynamic adjustment mechanism for peak-valley price.