Leishen LIDAR Contactless Vehicle Contour Dection System is a set of High Speed LiDARand Algorithm to fulfill the smart traffic application, aiming at fully automatic, non-contact to detect the dimension (length, width, height) of the cargo, trucks, lorries running on the highway, as well as the vehicles inspection at Vehicle Administration Bureau. The state of art system is adopting high speed LiDAR to capture the contour of vehicle quickly without stop or slow down requirement to the vehicle. The contour information includes height, width, length, tire wheelbase and other related parameters. The accuracy and anti-interference capability are significantly higher than the other non-contact detection technology (such as LiDAR, microwave, visual, etc.). LiDAR could work day and night , which could not only improve the implementation efficiency,but also reduce the staff’s workload.