Forests play an essential role in the terrestrial ecosystem. To better measure and understand the changes and structure of vegetation above land, NASA launched Global Ecosystem Dynamics Investigation (GEDI) space-borne lidar to monitor 51.6°S to 51.6°N areas. Currently, few pieces of research investigate how LAI varies with the height from the identified ground to canopy top in relatively high resolution. Generally, the waveform processing methods for GEDI can be categorised into two types: one is the direct decomposing. Another one is the deconvolution. For the second one, the Gold algorithm is a new method. This paper attempts to enhance the performance of the deconvolution and optimise Gold algorithm in the way of acquiring the optimised parameters combination. To improve the resolution of foliage estimate.