Based on the C++ programming language,this paper designs a software of the range gated imaging lidar to display the 3D point cloud in real time.The software is based on the imaging principle of range gated lidar,realizes the7 timing control of laser and time delay controller,high speed processing of point cloud data,filtering and denoising,and display the 3D images in real time.Based on the self developed range gated lidar and the software designed in this paper,an imaging experiment was carried out on a building with a distance of 700 m.During the experiment,the software can control the multi parameter of the range gated lidar and display the 3D image of the target in real time.The distance resolution of the 3D image reaches 0.157 m.The experimental results show that the software has the advantages of high accuracy,fast speed,and strong operability.It has a broad prospect in applications such as long distance detection and real time three dimensional imaging.