Preparation method of asphalt concrete warm mixing rutting and cracking resisting agent

The invention relates to a preparation method of an asphalt concrete warm mixing rutting and cracking resisting agent. The preparation method concretely comprises the following steps: fully mixing wax, resin and a cross-linking agent in a reaction kettle to obtain a modifying mixture; and adding a surfactant, a plasticizer and assistant to the modifying mixture, carrying out melt blending, and granulating the mixture through a granulating tower or a rotary belt condensation granulator to obtain the warm mixing rutting and cracking resisting agent. Compared with the prior art, the preparation method disclosed in the invention has the advantages of simplicity in operation, easiness in industrial generation, facilitation of reduction of the mixing temperature and the compacting temperature of asphalt concrete, reduction of the discharge of harmful gases, improvement of the moisture resistance, and high-temperature viscosity reducing and low-temperature viscosity increasing effects on asphalt; and the prepared warm mixing rutting and cracking resisting agent obviously improves the softening point, the ductility and the 60 DEG C viscosity of the asphalt, reduces the mixing and lying temperature, and improves the rutting resistance, the low-temperature cracking resistance and the water damage resistance of the asphalt concrete.