Asphalt mixtures with road phase change thermoregulation materials (DTC) can regulate the temperature of the material. The extreme high and low temperatures of DTC phase change asphalt mixtures are reduced compared to the equivalent material without DTC under the same external temperature conditions. In order to study the performance changes of the material before and after mixing DTC, the low-temperature mechanical properties of matrix asphalt mixtures (referred to as JZLH) and DTCLH were investigated with respect to their different operating temperatures exhibited under the same external temperature, i. e., the same service temperature operating condition. In order to obtain the temperature difference between the two materials under the same service condition, outdoor and indoor thermoregulation tests were conducted at the experimental design temperatures of -10, -20, and -30 ℃ based on JZLH. The test was based on the actual temperature of the pavement of the outdoor test section and the data of the indoor rutted plate in the high and low temperature alternating box, the temperature of the DTCLH was measured, and the average of the two was taken as the corresponding test temperature of the DTCLH, and the results are -6.8, -16.5 and -26.7 ℃, respectively. On this basis, the trabecular bending test and semicircular bending test of both mixes were carried out. The results show that the low temperature performance of DTCLH is lower than that of JZLH at the same temperature. Under the same service condition, the temperature of DTCLH is 3 ~ 4 ℃ higher than that of JZLH at low temperature, and the low-temperature performance of DTCLH is better than that of JZLH, and all of them meet the test specification requirements.