Abstract: Due to the rapid increase in power consumption around the substation, the operation and management of substation power is insufficient,resulting in a decrease in the capacity and total load of the substation,and an increase in active power loss. Therefore,an intelligent substation location and capacity optimization method considering multi station integration is proposed in this paper. By analyzing and studying the influencing factors of intelligent substation planning,under the condition of multi station integration,taking the substation,transformer and network cost as the optimization objective,the load points corresponding to the substation in each stage are constrained, the operation management of the intelligent substation is simplified,and the location and capacity model of the intelligent substation is constructed. The improved firefly algorithm is used to solve the established model to realize the location and capacity optimization of the intelligent substation.The results show that the maximum load after optimization is increased by 10 MW and the maximum substation capacity is increased by 14 MVA. The average value of active power loss after optimization is 94.6 kW lower than that before optimization.The success rate of optimal solution search after optimization is more than 90%,and the average search time of optimal solution is 24 ms. The proposed method can not only effectively increase the substation capacity and total load,but also effectively reduce the active power loss,and quickly complete the optimal solution search with a higher success rate.