Abstract: Flow shop problem (FSP) is a kind of typical scheduling model,which has higher practical value when added interfering factors.Intelligent water drops optimization (IWD) is a kind of new swarm intelligence algorithm.In order to resolve the inadequacies when solve FSP,the algorithm combined with Pairwise local search.This approach not only help algorithm escape from local optimization,but also improves the efficiency and performance of the algorithm.By constructing disruption management model which is a new job sudden arrival scheduling,and doing a simulation of the CAR8 problem,it turns out that the proposed algorithm is feasible and effective.