The conventional performance and low temperature rheological properties of four types of polymer modified asphalt binders were tested. In addition, the low temperature bending test of mixtures was also carried out. Combined with grey correlational theory, the correlation between low temperature indexes of asphalt binder and performance of asphalt mixture was analyzed. For these kinds of modified asphalt binder, the results show that the glass transfer temperature, rheological index and toughness resulted from low temperature force ductility test of polymer modified asphalt have good correlation with the low temperature performance of asphalt mixture. Glass transfer temperature has the highest relevance, which can better reflect the low temperature performance of polymer modified asphalt, followed by low temperature rheological index and asphalt toughness.