Using NCEP / NCAR reanalysis monthly and China 160 station average precipitation data, selected in September 2008 Wenchuan area rainstorm instance, analyze and verify the eastern Tibetan Plateau summer heat anomalies and abnormal relations between China local precipitation. The results showed that: (1) the eastern plateau summer heat can cause strong side 500hPa wind energy is too large, the energy value of the area with heavy rainfall large regional distribution is more uniform. (2) the eastern plateau summer heat can cause strong side of the South Asia High easterly stronger, causing WPSH westward extension, so that a steady stream of water vapor transport to the Sichuan Basin. (3) the eastern plateau during the summer heat anomaly, by heating field - height field - precipitation field over the same period and the lag effect, further affecting the precipitation in some areas of China exception.