The invention discloses an electric network topological structure analysis algorithm for distributive multi-island parallel cooperative calculation. On the basis of a dispatching automation system distributive calculation framework, firstly, a whole network model is split to form zonal electric network models; each node only parallelly completes once local calculation on a distributive model to obtain a primary electric island analysis result; then, each calculation node result is subjected to interaction sharing; once combined calculation is completed in a cooperative way; and a final electric island analysis result is obtained. The algorithm has the advantages that the problem of low analysis speed of a large electric network model topological structure can be solved; the goals of effectively reducing the calculation time, reducing a load of each calculation node and obviously improving the topological calculation efficiency can be achieved only through increasing the number of the calculation nodes; meanwhile, the distributive parallel calculation concept is used, so that the algorithm is applicable to future development requirements; and good expandability is realized.