In order to research the influence of dynamic water on the anti-cracking performance of asphalt mixture at low temperature,this paper introduces the dynamic water effect into the test,develops a laboratory test device for simulating the asphalt pavement affected by dynamic water,and puts forward a test method of dynamic water effect working together with load,water and temperature.Based on this method,the anti-cracking stability at low temperature of seven kinds of asphalt mixture is studied with consideration of asphalt grade,gradation type and air voids.Results show that the dynamic water can take adverse effect on the stability of asphalt mixture at low temperature.For the mixture with 10% air voids,the influence of the dynamic water effect is the most.The performance of the mixture with skeleton structure is better than that with suspended structure at the air voids less than 10%,and the mixture made of high-viscosity asphalt is largely affected by the dynamic water effect.