Abstract: The survey of forest canopy density is an important factor of forest survey.There have been some forest canopy density measurement methods at home and abroad,but all more or less have defects.Based on the point methods and the observation tube method in particular the laser measurement of tree canopy density was deeply studied.The Experiment not only improved observation tube method,but also solved the required number of points for a kind of precise measurement,which is still a controversial issue at home and abroad.This provides a new method and reference for finding a fast,simple and accurate measurement of forest canopy density

Key words: canopy density, laser measurement, the point method