The invention provides a distributed static security analysis method, comprising the steps of power flow calculation and related instruction initialization, distributed fault set screening, and distributed N-1 power flows of multithread/multiprocess, and the like. On the basis of the existing regional dispatching operation mode, each regional dispatching center calculates simultaneously, and exchanges a small amount of boundary information through the WAN under the unified management of a coordination layer to consider the interaction among regional power grids so as to achieve the same result as combined calculation. By a distributed power flow method, the invention achieves the same calculation result as the associative power flow calculation of a plurality of regional power grids, and realizes associative static security analysis of an interconnected power system under the existing dispatching mode. According to the invention, the distributed fault set screening is used, sorting is performed on the basis of electrical distances among line nodes, and distributed power flow calculation is carried out on lines in a fault set, and under the premise of ensuring the accuracy of the analysis, the computation speed is improved by using multithreading/multiprocess.