In order to study the improvement effect and engineering applicability of aggregate surface film modification technology on Asphalt Mixture Pavement performance, this study introduced surface film modification technology suitable for physical engineering, and paved a test section in Jiangmen section of Guangfo Expressway. Through field sampling, the core samples were evaluated in laboratory. The results show that the pavement performance of the modified asphalt mixture, such as water damage resistance, high temperature stability and low temperature performance, has been improved. At the same time, the pavement performance is monitored for a long time by using 3D radar detection, nuclear-free densimeter, sand laying method and pendulum friction detection technology. The uniformity of construction in the test section is excellent, and the modification technology has the value of popularization and application.