Using rendered wall as the reflecting target,the facular energy distributions of laser from laser rangers was collected,disposed and analyzed.It was found that energy density decreases from center to edge of the laser area,more than 80 percent laser energy was concentrated on the center area which only occupies 60 percent of the total laser area,and energy distributions of some laser rangers were obviously regiondisproportion;for ensuring range of laser ranger,correction for parallelism of optical axis must be more rigorous,and the correction system should be modified.