In order to optimize the evaluation index of high viscosity modified asphalt at high temperature, the high temperature properties of three kinds of high viscosity modified asphalt(12% of high viscosity modifier) and base asphalt were evaluated by hysteresis loop, dynamic shear rheological(DSR) test and softening point test. The rutting test was used to verify the results. Then, based on the rutting test results, the consistency and discrimination analysis of different high temperature performance evaluation indexes of three kinds of high viscosity modified asphalt were made. The test results and result analyses indicate that three kinds of high viscosity modifiers can improve the viscoelastic properties and high temperature properties of the base asphalt, but the modification effect is different. The evaluation indexes of different high temperature test methods can almost consistently evaluate the high temperature performance of the high viscosity modified asphalts, but the distinguishing ability is different, the hysteresis loop test index and zero shear viscosity(ZSV) of the Carreau model can distinguish and evaluate the high temperature performance of high viscosity modified asphalts well, while the distinction degree and consistency of rutting factor and softening point are poor.