AC 20 asphalt mixture containing different contents and different particle sizes of municipal solid waste incineration bottom ash aggregate(BAA) was designed by Marshall test method. The effects of BAA contents and particle sizes on pavement performance of asphalt mixture was analyzed. The stabilization of asphalt mixture on BAA was also evaluated based on the leaching test. Results show the dynamic stability of mixture initially improves with the increase of BAA content and then reduces gradually, and it also reduces with the increase in BAA particle sizes. The maximum bending strain of mixture shows a significant increasing trend initially with the increase in BAA content and then decreases gradually. The effect of 0475mm BAA with 10% content on low temperature performance is better. The water stability of asphalt mixture can be improved with small content(0%10%) and small particle sizes(0475mm). Furthermore, the stability of asphalt mixture on BAA soluble substance improves with an increase of BAA particle sizes, and a decrease of BAA content. According to test results, it is recommended that the suitable particle sizes and contents of BAA are 0475mm and 10% for using in asphalt mixture.