With the rising penetration rate of grid-connected renewable energy, the primary objective of load-side energy storage and its users is to maximize the overall benefits. Based on the low utilization rate and high cost of energy storage, the controllability of load and the rationality of energy storage configuration are two key points to be considered at present. Therefore, a large-scale demand response implementation strategy based on load alignment is proposed to give full play to the demand response ability of the load side. The load alignment proposed in this paper gives the full-time demand response adjustment target to solve the problem of load controllability. A shared energy storage configuration model based on social welfare maximization is established to improve the utilization rate and economy of energy storage. A cost allocation strategy based on Vickrey-Clarke-Groves （VCG） is proposed to achieve the global optimal effect and realize the sustainability of the proposed model. The simulation results demonstrate that with the participation of shared energy storage, the optimal social welfare is achieved. In addition, cost sharing is achieved through the VCG mechanism, and the investment return period of energy storage is shortened by 33.33%, which improves investment enthusiasm.