In order to compare the difference between M resin and sulfur modified asphalt stabilizer, two stabilizers were prepared according to the mass ratio of sulfur is 75%, tetramethylthiuram disulfide is 20%, and zinc oxide is 5%. The resin is equivalently incorporated in such a way that the sulfur mass remains unchanged. The softening point, penetration, 5 ? ductility, and 48-hour softening point difference index of the modified asphalt were measured in five cases: 0%, 0.05%, 0.10%, 0.15%, and 0.2%. The change law of each index, and the physical dispersion state of SBS modified asphalt was compared by fluorescence microscope. The test results show that with the increase of the amount of the two stabilizers, the softening point of the modified asphalt increases, the penetration degree decreases, the softening point difference at 48 hours decreases, and the ductility at 5 ? increases first and then decreases; M resin-based stabilizers and The optimal blending amount of sulfur-based stabilizers is 0.15%; under the optimal blending amount, compared with sulfur-based stabilizers, the M resin base has a reduced softening point of modified asphalt of 0.6 ? and an increase in penetration index of 2.2 (0.1 mm), the ductility at 5 ? is reduced by 0.7 cm, and the softening point difference at 48h is increased by 1.4 ?. The sulfur-based stabilizer is slightly better than the M resin-based stabilizer, but the difference is not large. Microscopic analysis also proves the effectiveness of the two stabilizers. It is feasible that M resin replaces sulfur to prepare modified asphalt stabilizer