The invention discloses a preparation method of warm mix low-pollution recycled asphalt. The recycled asphalt comprises the following raw materials, in parts by mass: 30-40 parts of an old asphalt mixture, 25-35 parts of new asphalt, 5-7 parts of a regenerant, 2-4 parts of a viscosity reducing agent, 3-5 parts of a plasticizer, 1-2 parts of an anti-aging agent, 5-9 parts of a warm mix agent, 3-7 parts of a solubilizing agent, 2-4 parts of a composite surfactant, and 7-11 parts of a composite modifier. The recycled asphalt provided by the invention can effectively reduce a mixing temperature, avoids secondary aging of an old asphalt film, and achieves the purposes of saving energy and reducing emission, when the interface composite modifier is added into the old asphalt mixture, old asphaltquickly peeled off is redistributed at the surface of the old and new aggregate, specific functional groups react with a sulfoxide group and a carbonyl group in the old asphalt, so that the road performance of the old asphalt film can be repaired, and the recycling of the old asphalt is realized.