The supply of sand and gravel and the drying and heating are carried out continuously, while the mixing with the hot asphalt liquid is batchwise and intermittent. The sand and gravel materials are separately stored in each hopper of the cold silo, and after initial volume measurement, they are sent to the drying cylinder by a belt conveyor for drying and heating. There are many long blades on the inner wall of the drying cylinder, the cylinder is slightly inclined towards the discharge side, and the discharge end is equipped with a burner. When the cylinder rotates, the sand and gravel are continuously lifted and scattered by the long blades, and move forward, contact with the flame sprayed by the burner, dry and heat, discharge out of the cylinder, and then be sent by the bucket elevator The screening machine is used for screening, and stored in each hopper of the hot bin, and then discharged into a weighing hopper with an electronic scale according to the specified mix ratio for stacking and weighing. At the same time, the stone powder is conveyed and weighed by the conveyor, and the hot bitumen liquid is pumped and measured by the bitumen pump. After the various materials are accurately dosed, the hot sand and stone material and stone powder are first discharged into the mixer for dry mixing, and then the hot asphalt liquid is sprayed on the hot material for mixing. The agitator is a two-shaft forced type. The two shafts rotate in opposite directions. There are several pairs of mixing blades on each shaft. After the mixture is fully stirred, the bottom discharge door is opened and discharged. The exhaust gas and dust are recovered through the pipeline, and discharged after being purified by the dust removal device. The main feature of continuous asphalt concrete mixing equipment is that hot sand and gravel and hot asphalt liquid are continuously metered and supplied, continuously mixed and discharged. The agitator is long, equipped with multiple pairs of mixing blades installed in a spiral direction, one end of which feeds continuously and the other end continuously discharges. Generally equipped with automatic control devices, automatic production can be realized, and the productivity is high, but it is difficult to accurately control the coordination.