Net primary productivity(NPP)is an important indicator of vegetations carbon sequestration capacity, with the rapidly rising of CO_2 concentration,NPP became one of the hotspots in the research of global climate change.Using the modified CASA model based on the previous studies,integrating with TM/ETM+image data and terrestrial weather observation data,estimated Wuhan Citys Winter NPP on the spatial resolution of 30mfrom 2001to 2010.The result shows that the average winter NPP in Wuhan is 8.55gC/m~2·m.There was an increasing in winter NPP from 2001to 2010,and each region has different velocity,Jiangxia is the highest,while shrub has the highest velocity and NPP among all vegetation types. Wuhan winter NPP has an spatial distribution of increasing from city center to around,and the region has the highest NPP which changed from Huangpi to Jiangxia in the past 10years.