Low temperature crack resistance refers to the ability of an asphalt pavement to resist low temperature shrinkage cracks. As the asphalt pavement decreases with temperature, the stiffness increases and the swelling capacity decreases. Under the action of external load, part of the stress has no time to relax, and the stress gradually accumulates. When the accumulated stress exceeds the tensile strength of the material, cracking will occur, which will lead to the damage of the road surface, so the asphalt pavement should have low stiffness at low temperature. And larger deformation resistance to meet the low temperature crack resistance.