Abstract: Asphalt pavement micro-surface treatment is one of the key technologies of asphalt pavement maintenance construction. A large number of practices have found that existing micro-surface treatment maintenance techniques have certain disadvantages. To this end, this paper proposes a composite modified emulsified asphalt material for preventive maintenance construction at the micro-surface. Practice has proved that the new material can effectively improve the high and low temperature performance of the mixture and avoid the problems of mixture segregation and looseness.Effectively repair pavement diseases, improve road performance and prolong pavement life. Based on this, this article combined with specific cases, analyzed and discussed the technical points of composite modified emulsified asphalt micro-surface maintenance, in order to provide a reference for the maintenance of asphalt pavement micro-surface.