To select the optimume valuation indexes of simple performance test (SPT) for the high temperature performance of asphalt mixture, the complex modulus test and repeated load test of SPT were conducted to evaluate the high temperature performance of seven kinds of AC-20 asphalt mixtures in the middle surface layer of the full-scale test circular track in Research Institute of Highway, Ministry of Transport (RIOHTrack).By means of the five evaluation indexes of dynamic modulus, rutting factor,flow number,ratio of per- manent straint of low number and permanent strains lope,based on the power function relation, the evaluation indexes among the same tests and the different tests were fitted to analyze the correlations among various indexes. There search results show that the SPT can effectively evaluate the high temperature performance of asphalt mixture. According to the comprehensive average value of correlation determination coefficients among variou indexes, the rutting factor and the permanent strains lope can be optimized and selected as the evaluation indexes of high temperature performance of asphalt mixture in the middle surface layer. The corresponding evaluation result shave good consistency.