“Technology news reporters reported that the new generation ICESat-2 satellite faces challenges in signal extraction in mountainous forest areas. To this end, experts have proposed a direction adaptive OPTICS surface and canopy surface detection method. This method first constructs a direction adaptive elliptical search domain to extract fine terrain, and then eliminates terrain influence to extract vegetation signals. The experiment shows that the accuracy of this method is as high as 0.97, and the elevation errors of the surface and canopy are significantly reduced. This method is suitable for areas with large slope changes and provides a reliable data foundation for forest spatial structure inversion.”