Road waste asphalt recycling device and working method thereof

The invention relates to a highway waste asphalt recycling device which comprises a crusher for crushing waste asphalt, a screening machine for screening the waste asphalt, a dryer for drying and heating the waste asphalt and new aggregate, and a stirrer for mixing and stirring the waste asphalt, the new aggregate, the new asphalt and a regenerant, the drying machine comprises a shell, a first drying cylinder and a second drying cylinder, and the first drying cylinder and the second drying cylinder are coaxially and rotatably mounted in the shell; when the drying machine is used for drying and heating operation, the new aggregate is added into the second drying cylinder for drying and heating, the waste asphalt is dried and heated in the interlayer space, synchronous heating of the new aggregate and the waste asphalt is achieved, drying and heating of the waste asphalt are completed in an indirect heating mode, direct contact between the waste asphalt and open fire is avoided, and the drying efficiency is imp