1. Overview As the basis and premise of engineering construction, earthwork calculation plays an important role in railway, highway, hydropower engineering, port, urban planning and other engineering construction. Accurate calculation of yard volume is of great significance in resource allocation, estimation of project cost, accelerating project progress and improving project quality. In traditional, earthwork calculation is mainly performed by using single point measurement through total station, GNSS-RTK, etc., which not only consumes time and money, but also there is a large error between calculation results and the reality. With the promotion and popularization of 3D laser scanning technology, there is a trend showing the rapid and diversified development for acquisition of 3D point cloud data, which has the characteristics to get quickly and effectively the point ...