Logical inspection is an important part of the statistical work of forestry investigation,and it is also the verification and confirmation of the previous investigation data.Based on the data processing flow,this paper designs the pre-logical checking method and post-logical checking method.Pre-logical checking includes sample factor logic checking,sample tree factor logic checking and multi-period data correlation checking.Multi-period data correlation checking adds multi-period data vertical comparison on the basis of previous single-period data logic checking,which is conducive to dealing with various logical errors in data.After logical checking,the stand factors of the same period after statistical calculation are calculated and compared with those of the adjacent period,and most of the data input and program calculation errors can be checked out.At the same time,this paper uses VB and built-in SQL language to develop relevant program tools,and embeds the logic check method into the program.