We firstly introduce development background of new collective forest tenure reform.The situations indicate that the collective forest tenure reform has already stepped into comprehensive and in-depth stage.However,due to neglect of local demands and actual conditions,there appear problems of low operating efficiency of supporting measures and relevant policies and little effect of in-depth reform.Therefore,it is required to strictly distinguish the relation between system change of collective forest tenure and the in-depth reform.For the purpose of in-depth reform,in accordance with local situations of forest farmers and forestry organizations,requirements for system,as well as local reform conditions,we strictly divide system change of collective forest tenure into three types:induced institutional change,hidden induced institutional change and imposed institutional change.Then,we divide the imposed institutional change into weak institutional change and pure strong institutional change.