Based on the meteorological data of 11 years, the meteorological conditions of mud-rock flow landslip occurrence in Sichuan Basin are analyzed, and a forecasting model of mud-rock flow landslip in Sichuan basin is developed. By interpreting and applying η numerical model, a heavy rain forecasting method is studied in Sichuan basin. And a mud-rock flow landslip and η numerical model interpretation system in Sichuan basin is developed. The result is good through the operational forecast in 2003.