Asphalt mixture heat preservation box

The utility model discloses an asphalt mixture heat preservation box which comprises a feed bin frame, wherein a bin chamber used for containing an asphalt mixture is formed in the feed bin frame, and a spiral conveyor is arranged at the bottom of the bin chamber; a sleeve is arranged in the bin chamber, and a heating fire tube is arranged in the sleeve; a combustor used for heating the heating fire tube is arranged on the feed bin frame, a conduction oil heating chamber is formed between the sleeve and the heating fire tube; a first heat exchange chamber communicated with the conduction oil heating chamber is formed in each of the front side wall and the rear side wall of the bin chamber, and a plurality of guide plates used for guiding conduction oil to flow in an S shape are arranged in each first heat exchange chamber. The asphalt mixture heat preservation box can effectively heat the asphalt mixture and effectively solves the problems of cooling and arch forming of the asphalt mixture.