In order to evaluate the pavement performance of nano composite modified asphalt mixture, the high temperature performance tests, the beam bending tests, the indirect tensile tests and some relevant durability tests of nano ZnO modified asphalt mixture, nano ZnO/TiO2 modified asphalt mixture and nano ZnO/TiO2/SBS composite modified asphalt mixture were performed. Then the performance of three nano modified asphalt mixtures were compared with matrix asphalt mixture and SBS modified asphalt mixture. The results show that the high temperature stability, the low temperature crack resistance, the indirect tensile properties and the durability of three kinds of nano modified asphalt mixtures are better than those of matrix asphalt mixture. In addition, the above mentioned performance of nano ZnO/TiO2/SBS composite modified asphalt mixture is better than that of SBS modified asphalt mixture. Hence, nanomaterial can significantly improve the performance of mixture. The nano composite modified asphalt is better than SBS modified asphalt and it is feasible to apply it into road.