This article takes China-Aid Morodok Techo National Stadium project of Cambodia, which is the most complicated stadium in terms of technology in the history of Chinese government foreign aid construction, combining VR, AR, HoloLens MR, 3D laser scanning, 3D printing and other advanced BIM technologies.With BIM management as the main line, through systematic BIM application of cable tower, prefabricated concrete seating, ring beams and ring columns, awning, etc., providing a basis for super-large special shaped concrete structure construction, prefabricated construction, flexible structure construction, and deformation control construction, and summarizing a set of overseas BIM construction technologies. BIM technology is used to help the smart construction of overseas projects, build a BIM application benchmark for foreign aid projects, and fill in the gap in systematic BIM applications in Southeast Asia.