When designing the topology architecture of a large network,or managing and controlling a run network,the battleneck is always changeable with the increase of the network flow,which must be considered. In this paper ,af-ter analyzing the Ford_Fulkerson algorithm,we point out the relationship between the network min-cutset and thenetwork bottleneck,present an optimal capacity expansion algorithm based on min-cutest ,and take a network instanceto analyze and prove our algorithm in detail. This algorithm can improve the capacity of network effectively and solvethe bottleneck problem of the network.
