Abstract:The majority of failures and losses in the power system take palce in the distribution network. Switches in the proper positions in the network to divide the line into different parts are important,not only in increasing reliability,but also in maximizing savings in economic costs.Switches operation optimization models are made,taking into account the power loss and reliability of distribution network,focusing on howto improve the genetic algorithm to run the optimization better,the practices of the system showthe feasibility of the proposed model and algorithms.