Abstract: Taking the mixed forest of Wuzhishan City as the research object, the carbon storage of broad leaf mixed forest was taken as the indicator of forest carbon sequestration.Hydrological factors, DBH × tree height, canopy density, altitude, slope were introduced into spatial autocorrelation model which established by Geoda and Arcgis.The relationship between carbon sink and its influencing factors was studied.The results showed that DBH × tree height, canopy density, altitude, slope and distance from water were important factors affecting the carbon sink distribution.Canopy density, tree height and DBH × tree height had the greatest effect on carbon sink, followed by elevation, distance from the waters.the slope factor was the smallest.Each regression equation of sample points and carbon sinks was different.So each factor at different points impacted carbon sink value differently.According to the effect of factors on carbon sink value, forest management was implemented by appropriate measures to enhance the region′s carbon sequestration capacity, thereby enhancing its carbon sink function in this area.