Cleaning device of overflow screw conveyor

The utility model discloses a cleaning device of an overflow screw conveyor, which comprises a screw conveyor body shell, a maintenance mechanism is arranged on the screw conveyor body shell, the maintenance mechanism comprises a shell, the screw conveyor body shell penetrates through the shell, a cleaning discharge port is arranged at the lower part of the screw conveyor body shell in the shell, a discharge hopper is connected below the shell, and the discharge hopper is connected with the shell. And an observation window is arranged on one side of the shell. According to the utility model, through the arrangement of the maintenance mechanism, when the screw conveyor is shut down for maintenance, the cleaning discharge port is opened to discharge dust, so that dust overflowing into the screw conveyor can be completely discharged, the dust is prevented from being retained in the screw shaft and hardened due to moisture regain, and dust and sand are not easy to fly and pollute the environment during cleaning.