This paper is taking Sun Yat-sen University Shenzhen Construction Project as the scenario, traditional-based earthwork calculation methods, such as approximate volume estimation method, section method and grid method, are being compared with UAV-based measured DTM method in the complex earthwork balance of foundation pit, slope and field. The efficiencies and accuracies aspects of two methods are being counted. The trial conditions, advantages and disadvantages of UAV measured DTM are being clarified, which provides a reference for the application of similar projects in the future.