Abstract: Using the observational temperature data at 160 stations of China and five West Pacific Subtropical High(WPSH) indices,the inter annual variations of the intensity of WPSH,area,the western ridge point,the ridge line and the north boundary in September from 1951 to 2010 along with their impacts on contemporaneous temperature of China have been analyzed. The results show that the five indices have obviously inter annual variability. The intensity and area of WPSH has significant growth trend,while the western ridge point and the ridge line and the north boundary of WPSH has no significant trend.On the inter annual scale,the western ridge point and the ridge line and the north boundary of WPSH have significant correlations with the temperatures in regions of China in September. when the WPSH moves eastward(westward),the temperatures in the eastern part of Tibetan Plateau and the west of Sichuan province and Yunnan province and some areas of the Southern China would decrease(increase); When the ridge line or the north boundary of WPSH moves northward,the temperatures over the south of Yangtze River Basin areas(especially in the most areas of Guizhou province and some areas of Zhejiang and Fujian province) would increase and vise versa.