The invention relates to the technical field of asphalt mixtures, and discloses a discharge device for a road asphalt mixture. The discharge device comprises a storage tank, a bottom end portion, a discharge pipe, a driving motor, a rotating shaft, a cylinder, a switch-plate, a bracket plate. a support column, a base, a discharge hopper, an electric push rod, a push plate, an electric heating tube, a drive motor, a stirrer and a feed hopper, wherein the bottom end portion is located at the bottom of the storage tank, the middle position of the bottom of the bottom end portion is fixedly communiated with the top of the discharge pipe, and one side of the drive motor is fixedly connected to the upper side of the middle position of the right side of the discharge pipe. The discharge device achieves the purpose of rapidly discharging asphalt and avoiding a clogging phenomenon, and at the same time, controls the rate of discharging the asphalt by the speed of the rotation of the switch-plate, thereby improving the real-time manipulation of the asphalt discharge condition. And with the reverse taper of the bottom end portion, the asphalt can be concentrated at the top of the discharge pipe, thereby improving the discharge efficiency for the discharge pipe.