with northwest 119 weather stations from 1961 to 2005 autumn precipitation data, analysis of its spatial distribution and temporal variation, correlation analysis and a typical year comparison, the fall of the north-west of the relationship between precipitation and SLP. The results show that the precipitation in the autumn of NT space has obvious differences, at least, is the cold Qinghai Lake weather station for the 0.9mm, most Shiquan Shaanxi Meteorological Station for 270.0mm. Typical rainy years, the t...