Changes of the temperature and precipitation in Henan county,Gande county,Tongde county,Yushu county,Qumailai county,Zhiduo county and Maduo county of Sanjiangyuan regions in the recent 9 years and the response of grssland climate productivity to these changes were analyzed based on the meteorological data observed during the pieriod from 2002 to 2010,using the Tharnthwaite Memorial model and mathematical statistics method,the direction of productivity change and ecological economic development strategy of Sanjiangyuan regions were explored.The results revealed that,the temperature and precipitation both showed a certain upward trend,the climate trended to be a warming-weting pqttern in Sanjiangyuan regions,and grssland climate productivity was inclined to linear increase.There was a siginificant correlation between the grssland climate productivity and the temperature and precipitation,grass productivity is mainly affected by the impact of temperature,and precipitation aloso was the Key factor.The government should implemente ecological protection and ecological compensation,and enrichment the income source of herdsman to promote the regional ecological-economic