In order to solve the problem that the traditional topological coloring analysis method is of slow speed and low efficiency, and cannot adapt to the high efficiency requirements of power system application software, the key technology of distributed parallel network topology is studied. Through the research of the reasonable network topology model, the method of the topology calculation program is transformed into a multi thread parallel processing. And then by making full use of the resources of the cluster and network, the whole network topology is divided by different servers to carry out the analysis and calculation. Finally each parallel server uses a high efficiency of network topology analysis algorithm. After the above steps, the network topology calculation can improve the efficiency of the computation and operation, and can be expanded reliably.