Closed composting device

The utility model relates to a closed compost fermenting device, belonging to aerobic forced ventilation static compost fermenting equipment, which comprises one or a plurality of closed compost warehouses, the lower portion of each compost warehouse is equipped with an air inlet and the warehouse cover is provided with an air outlet. The microorganism in the compost is provided with abundant fresh air to grow through utilizing the positive-pressure ventilation (the air inlet) or the negative-pressure ventilation (the air outlet) and the control valve on the ventilating pipe, which can speed up the breeding and growing of the microorganism, shorten the harmless and maturing time of the compost raw material. The ventilating time is controlled by the time and temperature controller and also the odor in the outlet can be done centralized biological treatment. The fast closed compost fermenting device with simple structure and wide applicable range is convenient to maintain and not limited by geographic positions, and also the compost raw material can be completely matured after 14-21 days, thereby achieving very distinctive economic, ecological and social benefits.