Abstract: Based on daily live precipitation from 152 stations in Sichuan Province and daily precipitation forecasts of T213, Germany, Japan、south-west region localization MM5 ensemble forecast model and members from May to July in 2008, TS scores were conducted.Experiments of integration and integration techniques were made based on TS scores weighing coefficient of 8 members of ensemble forecast.The results show that:integration forcast has improved, and integration is superior to successive regression and SVM.At last, integration of 11models were made by using the method mentioned above.Then forecasting effect was carried out from Sichuan rainfall from August to September in 2008, the result show that:the integration rainfall forecasting has improved significantly compared with single model.