Abstract: This article introduces the application of mesoscale meteorological model MM5 and small-scale model CALMET which makes up the wind energy resources system simulation model,and then imitates the each highly layer wind speed,wind power density with 1 km horizontal resolution during this time from June 1,2009 to May 31,2010.Moreoer,this article has worked out the distribution map of numerical simulation on wind energy resources in Yunnan Province.Finally,this article validates the correctness between the the simulation results and actual measurement data provided by 4 anemometer towers in Yunnan Province.