This paper assessed the differentiation degree and distribution of forest resources between forest resources dynamic monitoring data(FRD) and national land survey data(LSD) in Hangzhou,and then analyzed the causes of data difference.The results showed that the overall consistency between FRD and LSD was relatively high,reaching an average of 88.06%.Difference map showed that most of the differences were collective forests,plantations,commercial forests and forests with low protection level.However,the total difference area of national forests,natural forests and public welfare forests were still quite large,which needed close attention by the forestry authority.