To research the self healing performance of asphalt mixture macro fracture, the semi circular bending(SCB) test conducted using the 70# base asphalt mixture and SBS modified asphalt mixture for fracture healing fracture test. The tensile strength ratio before and after healing is defined as healing index(HI), the effect of healing time, healing temperature and pressure for self healing performance was investigated. The results indicate that macro fracture occurs after healing of the asphalt mixture in a certain environment, the strength recovery rate is equal to 45%; raising the temperature, prolonging the time and putting pressure have a certain promoting effect on the macroscopic visible cracks healing of the asphalt mixture, but its not true that the higher the temperature and the longer the time, the better the self healing performance. The optimum healing temperature is related to the asphalt softening point and the type of asphalt mixture. When the healing temperature is less than or equal to 60℃, putting pressure has a positive effect on the crack healing of the asphalt mixture, the HI value obtained with the confining pressure specimen is up to 4.5 times of that without confining pressure specimen, and the HI value of SBS modified asphalt mixture is 4 times that of 70# base asphalt mixture; when the temperature is more than 60℃, application of pressure does not show significant improvement of the self healing performance, and the difference in the type of asphalt mixture is also not notable.