The invention discloses a belt pulley conveying and discharging mechanism of an asphalt maintenance vehicle. The belt pulley conveying and discharging mechanism of the asphalt maintenance vehicle includes a belt pulley and a discharging mechanism body, and is characterized in that a steel crawler is disposed in the belt pulley, and a driving wheel and a driven wheel both can set fixed positions ofgear shafts of the driving wheel and the driven wheel to set heights to facilitate standing or increase or decrease friction; and when the belt pulley first transfers a prepared or stirred asphalt mixture to discharging equipment, the gear shaft, near the discharging position, of the belt pulley is fixedly connected with the gear shaft disposed in the discharging mechanism, and a discharging knife is mounted at the position where the gear shaft is matched with and fixedly connected with a shaft. The bonding force of asphalt and aggregate is mainly composed of van der waals force, ionic interaction force, mechanical bonding force and the like, and thus high viscosity is achieved, the asphalt maintenance vehicle adopts the belt pulley to convey, although the conveying capacity is high, theall-covering design enables the asphalt mixture to have a large contact area and liable bonding, and thus the design of the discharging mechanism is particularly important so that the retention of theasphalt mixture after being conveyed by the belt pulley can be prevented.