The Government attaches great more importance to forestland resources protection since the implementation of The forestland protection and utilization planning outline (2010—2020) and the State Forestry Administration requires that the quality of project feasibility reports on using forestland should be improved.On the other hand,the State Forestry Administration implements strict supervision and inspection of the projects using forestland.But there are some questions about identifying forestland in plain investigation.As for whether the land used by the project is cropland or forestland,different departments have different views.This paper mainly discusses the controversial questions,and some advices are put forward.