The electric spring (ES) has unique advantages in distributed compensation and voltage stabilization. Aiming at the shortage of demand side management (DSM) technology in completing demand side power regulation through direct control, this paper studies a demand side power regulation technology of micro-grid based on ES to improve the current DSM system. Firstly, the characteristics of direct control load and non-critical load (NCL) under DSM system are analyzed, and ES is applied to demand side power regulation. Secondly, the voltage stabilization of critical load (CL) in ES is studied under this technology. The controllability of non-critical load in demand side on power consumption when supply is unbalanced under micro-grid is discussed. Finally, the voltage stabilizing effect of the ES and the power regulating ability of the demand side are verified through experiments, which meet the requirements of the proposed goal.