In view of the present situation of the research on the surface modified basalt fiber(BF) in China, and to improve the reinforcement and reinforcement effect of BF in asphalt mixture, silane coupling agent(KH550) was adopted in BP surface treatment, and a set of device which suitable for KH550 surface treatment BF was developed. The mechanism of KH550 surface modification BF was studied by infrared spectroscopy, scanning electron microscopy and X-ray energy spectrum, the research has shown that KH550 solution can significantly improve the surfa...