Abstract: In this paper, the distribution of NPP of natural vegetation in China was given according to a new NPP model. This NPP model was based on ecophysiological feature and regional evaportranspiration model relating the two well known balance equations on the earth’s surface, water balance equation and heat balance equation. The changing pattern of NPP in China was also given under doubled CO2 concentration. This study would help to make good use of natural resources and to make scientific count-measures under global climate change.