Abstract: The annual update of "one map" in 2020 should fully integrate the results of the third land survey,which is an important work under the background of unified monitoring of natural resources.Combined with investigation,the author finds that there are some problems in this work,which affects the smooth progress of the work.This paper analyzes the present situation of forestry investigation and monitoring work in detail,and puts forward corresponding work suggestion in order to serve the annual update of "one map" work.