To ensure high-speed and reliable operation of the intelligent distribution network,the paper researches a intelligent distribution network island divided strategy with distributed generation based on the Prim intelligent algorithm. Finding the method of the minimum spanning tree of a connected graph,the algorithm solves the island divided issues of the intelligent distribution network. Failure in the distribution network,it formulates timely the optimal island divided strategy to be propitious to reduce the blackout area and outage time of the fault restoration of power grid.In this paper,the algorithm is applied to the intelligent distribution network with distributed generation with IEEE33 nodes,verifying the effectiveness of the intelligent algorithm.