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The range profile is studied first in the microwave band.With the advent of the lidar technology,the range profile is studied from microwave band to the laser band,which is the laser range profile (LRP).The outstanding feature of LPR is that it can obtain the 3-D shape and the range information of the target by one ultra-short pulse without optical scanning system.In this paper,Laser range profile theory and simulation is investigated.Laser range profile simulation is studied based on the theory of beam scattering by rough target,pulse wave scattering theory and the radar equation,the calculated formula of one-dimensional range profile is obtained.