The structural characteristics of drying drum of the gas-generator mixing plant and the gas-generator technology were introduced. Through the thermodynamic analysis of drying drum of gas-generator mixing plant, the calculation process of thermal efficiency and thermal equilibrium of drying drum was obtained. Combined with actual production, 600-type asphalt mixing plant was taken as an object to analyze the main factors that affect the thermal efficiency of drying drum, which provides reference for energy utilization and structural op...