Abstract: In this paper,the improvement is made based on traditional exponential state of charge（SOC）droop control strategy,and a variable adjustment factor SOC droop control strategy is proposed. By changing the value of the adjustment factor at different stages,on the premise of ensuring system convergence,the power response speed is increased,to the problem of incompatibility between power response speed and convergence speed in traditional SOC droop control is solved. Finally,the distributed energy storage simulation platform and experimental platform composed of two energy storage module（ESM）were built to verify the advantage of the proposed SOC droop control strategy in power balance speed.