Preparation method of regenerant for ultrahigh-content fine-separation asphalt mixture

The invention discloses a preparation method of a regenerant for an ultrahigh-content finely-separated asphalt mixture, which comprises the following steps: mixing petroleum asphalt, corn oil, epoxidized soybean oil and liquid rubber, heating, stirring and reacting, adding a cross-linking agent, stirring, cooling to room temperature, finally adding a curing agent and an accelerant, and stirring to obtain the regenerant. When the regenerant is prepared, the liquid rubber and the epoxidized soybean oil are subjected to a high-temperature reaction to form a three-dimensional network structure, the three-dimensional network structure is uniformly distributed in the asphalt mixture, and meanwhile, the cross-linking agent is uniformly fixed in the mixture, so that sublimation of the cross-linking agent is avoided in the use process of the regenerant, the liquid rubber is fully vulcanized, and the service life of the regenerant is prolonged. The mechanical property of the regenerant is improved, and the high and low