Abstract: To explore the feasibility of coal gangue powder applied in micro-surfacing, the coal gangue powder and activated coal gangue powder were selected to replace the filler of micro-surfacing mixture, and the different combination specimen was formed. The Hamburg wheel tracking test, accelerated wear test and shear fatigue test were used to analyze the road performance and interlayer property of micro-surfacing mixture with different fillers, and the significant influence of different factors on long-term performance of microsurfacing was analyzed. The results showed that the high temperature performance, moisture susceptibility, abrasion resistance, longterm skid resistance of micro-surfacing were improved when the coal gangue powder was selected to replace the mineral powder, and the improvement effect of high temperature activated coal gangue powder was better, and the substitution amount of coal gangau powder had a higher impact on the different properties of micro-surfacing than the coal gangue powder. But the road performance and interlayer property of micro-surfacing were damaged due to the cement was replaced by the coal gangue powder. The long-term performance of micro-surfacing was closely related to the dosage of coal gangue powder, the dosage of coal gangue powder was greater, the long-term performance of micro-surfacing was better. The mineral powder was replaced completely by the coal gangue powder, the high temperature performance, moisture susceptibility, abrasion resistance, long-term skid resistance and shear fatigue life of micro-surfacing were improved by about 26. 8% and 36. 4%, 33. 5% and 40. 0%, 33. 4% and 45. 1%, 4. 7% and 6. 8%, 9. 5% and 10. 4%, respectively.The research results will provide reference basis for coal gangue applied in asphalt pavement maintenance technology.