With the popularity of electric vehicles，the impact of large-scale electric vehicles on the distribution grid will become more apparent. In this context，a real-time rolling optimization strategy for charging stations considering the reactive response capability of charging piles is proposed. The spatial and temporal distribution characteristics of electric vehicles and the active and reactive interaction capability between charging stations and power grids are fully considered. A two-layer model is established to optimize the active and reactive power of the charging station in time and space. The quadratic programming and the second-order cone programming are used to solve the upper and lower models. Finally，the simulation is carried out with the improved IEEE33 node distribution network system，and the simulation results show that the strategy can effectively reduce the load peak and valley difference as well as the active power loss of the system and improve the voltage level of the network.