Abstract: At present, China's highway industry has entered the development period of "emphasis on construction and maintenance". Asphalt pavement is the main form of pavement structure of China's high-grade highways. With the continuous increase of highway service years, the early diseases of asphalt pavement become more and more serious, so the road surface is tested accordingly Become inevitable. Studies have shown that non-destructive testing technology will not cause destructive damage to the road surface, at the same time, it has the advantages of high accuracy, easy operation, and fast testing speed. This article describes several different non-destructive detection methods of pavement,taking 3D ground penetrating radar technology as the research object, and combining engineering cases to discuss the detection effect of 3D ground penetrating radar, with a view to improving the accuracy of the detection of asphalt pavement structure disease information.