The invention provides a method for improving the power supply reliability of a distribution network based on an intelligent soft switch. According to the method, based on an intelligent soft switch power supply recovery model, the influence of each branch fault on a load node is analyzed, a fault correlation matrix is constructed, the reliability parameters of each load node are calculated, therefore, the reliability index of the entire distribution system is obtained, and the improvement of the reliability of the distribution network by the application of the intelligent soft switch is analyzed.