Abstract:Statistics suggested that the area and volume proportion of Pinus massoniana Lamb.to Hubei Province were 37.8% and 40.6%,which were both the highest in all tree species.But there were some gen- eral problems,such as the tree species structure was single,the growth speed was slow,the ecological protec- tive function was low,and the economic benefit was bad.The low-yielding and inefficient Pinus massoni- ana Lamb.forest wasted the limited forestland resource seriously,and it prevented us becoming the forest resource and industry prosperous province.Therefore,the authors analyzed the formation cause of low- yield forest,and gave the view on improving measures,for reference only.