The influences of hydrophober, coupling agent and ball milling time of anti freezing material on hydrophobic property of anti freezing material and salt releasing in asphalt mixture were investigated by conductivity measurement. The microstructure of anti freezing material was observed with SEM. In addition, the contrast studies on road performances of asphalt mixtures with or without anti freezing material were carried out. It reveals that the hydrophobic property of anti freezing material increases and the salt releasing speed in asphalt mixture reduces with increasing the use level(by mass) of hydrophober. Coupling agent has smaller influence on the hydrophobic property of anti freezing material, however，it has bigger influence on salt releasing in asphalt mixture. The ball milling time influences the fineness of anti freezing material particle which changes the hydrophobic property of anti freezing material and salt releasing in asphalt mixture. Hydrophober covers on the irregular anti freezing material particles. As compared with the asphalt mixture without anti freezing material, the water stability of asphalt mixture with anti freezing material gets better slightly, dynamic stability and low temperature flexural strain get worse slightly. In snow falling condition, the asphalt mixture with anti freezing material shows evidently the anti freezing function.