Aiming at the problem of reactive power compensation in low voltage distribution network,a reactive power compensation optimization model with minimun net loss as the objective function is established,the improved interior model is used to solve the optimization model in the process of optimization.And in the distribution of low-pressure side of the root point of the allocation of compensation device can not solve the low-voltage distribution network loss and so on,The optimization medthod of reactive power compensation device with multi-point distribution on the low-voltage side of the distribution transformer is proposed,the model is solved by using the improved interior point method with all the load nodes as the compemsation points,get the ideal configruation after the orogram,taking into account the economy of compensation and easy maintenance and other factors,select several final compensation point for reactive power compensation device configuration.The feasibility and practicability of the method are analyzed and verified by the actual low-voltage distribution network.