With the continuous development and application of geographic information system(GIS)technology,GIS-based forestry survey technology has been widely used in forestry resource management,ecological environmental protection,forest fire monitoring,and forest pest and disease monitoring.This paper introduces the importance and current situation of GIS application in forestry survey by outlining the basic concept and definition of GIS,and summarizes the GIS technologies commonly used in forestry survey,such as remote sensing,GPS and DEM technologies.At the same time,the application techniques of GIS in forestry investigation are explained through practical cases,and the advantages and challenges of GIS in forestry investigation are discussed.Finally,suggestions are made to strengthen technical research and application promotion to promote the further application and development of GIS in forestry survey and achieve more scientific and sustainable forestry resource management and conservation.