Abstract: With the continuous development of science and technology，the surveying and mapping technology applied in the project has also been greatly developed. The earthwork calculation in the project is the basic part of the project. The emergence of small UAV makes this part of the work can be completed efficiently ,quickly and at a low cost.Based on the specific project，this paper uses DlJl phantom 4RTK UAV measurement system as a measurement method to complete the 1:500 topographic map surveying and earthwork calculation of Chuxiong Rebake Plant ( Nanhua) of Yunnan Tobacco Leaf Co.，Ltd，and compare with the traditional RTK measurement method and discuss the advantages and disadvanlages of UAV in engineering application for reference.

Key words: unmanned aerial vehicle(UVA), foundation engineering, earthwork, real-time kinematic(RTK), southern CASS