According to the long-distance water transfer project, the data envelopment analysis (DEA) model was used to study the post-evaluation of emergency control of sudden water pollution accidents. The technical cost, labor cost and pollutant monitoring cost were taken as DEA input indicators. The degree of pollution impact, ecological environment loss and direct economic loss after the regulation and control were taken as DEA output indicators. The effect of the model was used to reflect the advantages and disadvantages of the emergency control measures, the optimal emergency control measures were chosen. The results showed that the optimal emergency control measures based on DEA model is consistent with the results of numerical simulation, which demonstrated that the post-evaluation model based on DEA has a better analysis effect.