Abstract: Environmental field,sounding meteorological elements of the time series data for use MICAPS June 2015 26 to 30 Western Sichuan Plateau persistent heavy rainfall weather process warm area 500hPa average height,temperature,humidity and wind speed and other factors were analyzed. The results showed that: the West Sichuan Plateau warm area with intermittent heavy rain,sudden,local resistance,strength,violent and other characteristics; highland area in the warm rain northeast,central wet area,low wind speed area; dry Lu Feng,wind speed convergence together,the dry cold air sinks,non-adiabatic heating may become heavy rainfall plateau trigger conditions; maintenance and non-adiabatic heating plateau unstable stratification of local produce heavy rainfall weather provided favorable conditions for the energy and dynamic environment,high altitude maintenance and low-level moisture spurt wet layer is water vapor local environmental conditions produce heavy rainfall.These can be used as heavy rain forecast plateau concerns.