The utility model discloses a biological charcoal device of mud system with automatic air outlet mechanism of continuous feeding, including reation kettle, and be used for to the reinforced automatic feed air outlet mechanism of reation kettle, automatic feed air outlet mechanism include feeding barrel body and set up the conveyor screw in feeding barrel body, the intermural clearance of giving vent to anger of leaving in the upper portion of conveyor screw and the feeding barrel body, feeding barrel body's front end is connected with the intermediate bunker, is equipped with first blocking valve between intermediate bunker and the feeding barrel body, feeding barrel body's middle part and an air -cement separator's bottom intercommunication, there is the oil blanket ware at the top of this ash separator through the tube coupling, and the bottom of this oil blanket ware and feeding barrel body intercommunication, the terminal of feeding barrel body is connected with reation kettle. The utility model discloses simple structure, convenient operation can continuous feeding and self sealing, and work efficiency is high, and safe and reliable is particularly suitable for the big production of serialization in batches.