Based on the physical process of temperature variation,a technique of dynamic-statistics interpretation of NWP products was suggested. The interpretation scheme about the in-vading time and descending temperature of cold wave over Sichuan basin was developed. Byuse of ECMWF products,the automatic forecasting system of cold wave was built and it can be rulled to forecast the cold air in the coming one to six days. The operational forecast was conducted in 1995 and the effective result was obtained.