The invention discloses a pouring type asphalt preparation process. According to the pouring type asphalt preparation process, an MA preparation mode is used for preparation, and the design of mix proportion and technical index requirements are performed according to an MA system; an asphalt mixture production GA mode is used at the first stage of the process, the ageing speed of asphalt in MA is improved, and accordingly the objective of shortening time is achieved; on the basis of guaranteeing of the quality and the performance of paving materials, the production efficiency is improved through process improvement. The invention further discloses an asphalt agitator with heating double horizontal shafts. Space in a cylinder is fully applied, agitation energy of blades is completely released, the motion of the materials is more sufficient, the agitating effect is more even, and the efficiency is higher.