With the large-scale integration of new energy sources like distributed photovoltaics, distribution grids are facing challenges related to reactive power flow, voltage distribution, and power loss. This paper introduces a distribution grid load balancing method based on regional precision control to accommodate the integration of new energy, ensuring the safety, stability, and economic operation of the distribution grid. A comprehensive model of the distribution grid, including new energy sources, has been established. By combining the asset ledger and operational data of medium voltage graphical model equipment, a panoramic simulation environment is created.Utilizing the improved Newton-Raphson power flow calculation method and considering the safety of the distribution system and operational constraints of the energy storage system, the dynamic load and operational loss of the distribution grid are analyzed. Through precise analysis, the optimal operational mode of the grid lines and the opening and closing positions of switches are determined, achieving relatively balanced load and minimal operational loss. Taking into account the output of new energy and equipment load characteristics, staggered and orderly electricity usage strategies are formulated to reduce peak electricity load and alleviate operational pressure on the grid.Simulation results indicate that this method thoroughly considers the randomness and uncertainty of distributed photovoltaics. Through precise control strategies, it effectively reduces the operational loss of the distribution grid, ensures power balance and voltage stability, and meets the requirements for the safety and economic operation of the distribution grid.