Based on the remote sensing images of 1976,1990,2002,and 2011 of Bosten Lake Basin,the field investigation and other related information,the changes and the influential factors of the ecosystem service values of the wetlands of small lakes of the Bosten Lake Basin during the period from 1976 to 2011 were examined.The results showed that:(1)the fluctuating change trend of the wetlands area of the small lakes of the Bosten Lake Basin was observed during these nearly forty years,among which,in 1976,the wetland area was the maximum,and reached up to 3 813.12 hm2;while in 2002 and 2011,these reduced to 3 138.12 hm2 and 2 285.53 hm~2,respectively;(2)in the whole research period,as the whole,we could see that the changes of the ecosystem service values of the wetlands of the small lakes showed decreasing trends;and from 1976 to 1990,there was a mean reduction of them as 2.67% per year;but from 1990 to 2002,these increased by 2.63%per year.This research showed in the whole research period,the wetland areas and the ecosystem service values of the research area showed decreasing trends since 2002,and the decreasing trends were much faster than the former 15 years.From the contribution of each ecological function service value of the total ecological system function service values,we could get that the contribution rates of the waste disposal,the water conservation and the climate regulation to the whole ecological service values were the maximum,and they increased from 1976 to 2011.This research showed the changes of the wetland areas and the ecosystem service values of the small lakes of the Bosten Lake Basin were closely related with the natural and anthropogenic factors in nearly 40 years,and we should pay much attention to the negative influent that was caused by the unreasonable human activities,and should make reasonable plans for the development of the economy activities in the basin.