In order to research the effects of aggregate gradation on micro-surfacing, the control variable method was used, the effects of different aggregate gradation on drying micro-surfacing added by waste rubber powders were studied, through a series of laboratory testing, indexes such as mixing time, cohesion torque, wet track abrasion value, load wheel value were studied. The results showed that intermediate gradation with 10% and 11% of the bitumen-aggregate ratio had the optimal performance. The mixing time and cohesion torque could all meet specification requirements; its anti-wear value and the adhering sand amount were smaller than conventional. So the micro-surfacing layer should form the internal compact, but also the formation of rough surface.