To improve the performance of porous asphalt mixture, several influence factors on performance were analyzed, including aggregate gradation, binder type and additive and measures were recommended to improve porous asphalt performance. The results show that with the increase in void, porous asphalt mixture stability is deteriorated, surface features are enhanced; dynamic viscosity at 60℃ is the most critical index for binder used in porous asphalt; fiber additives can significantly improve the durability of porous asphalt mixture; lime can improve water stability of porous asphalt mixture. So, porous asphalt mixture should be made of high viscosity binder and polyester fiber, and lime can be used to substitute the same quality filler in the areas where better water stability is desired.