Net primary productivity(NPP)can directly reflect the production capacity of the vegetation in the natural environment.the NPP of River Wetland in Hulun Buir sandy land on air changes and driving force were analyzed using the data of temperature and precipitation and combining with remote sensing images,simple difference method and trend analysis and linear regression.The results showed that:considering the time,the sandy land in Hulun Buir River Wetland NPP presented the fluctuant growth,NPP growth in the area of wetland accounted for up to 92.51%of area,the annual growth rate was between 0~2gC/(m~2·a);with respect to the space,NPP presented the distribution of the east high west low;during the 15 years,the wetland with fastest growing NPP is in Western Herlen wetland with growth area of up to 99.5%;climate change and human activities are two important factors that lead to the changes of NPP,NPP is significantly correlated with the increase of precipitation(R=0.703),negatively correlated with temperature(R=-0.559).The change of the economic industrial structure makes the pressure of human activities on the ecological environment decrease,which leads to the increase of NPP.At the same time,the national policy and the sand control project also affect the change of NPP.