The utility model discloses an airtight aerobic?fermentation cylinder, including strutting arrangement, barrel, power drive device, ventilation unit and business turn over material system, barrel and power drive device are established respectively on strutting arrangement, and the barrel includes that the feeding fix the fixed end cover of end cover, middle rotary cylinder and the ejection of compact, and the barrel is fixed end cover one end by the feeding and is fixed the downward sloping of end cover one end to the ejection of compact, fixed end cover of feeding and the fixed end cover of the ejection of compact pass through end cover fixing device with middle rotary cylinder respectively and are connected, end cover fixing device includes rotary fixing structure and rotation support structure, the interior terminal surface department of fixed end cover of feeding and the fixed end cover of the ejection of compact is provided with end cover antifriction device. The utility model discloses simple structure, work efficiency are high, degree of automation is high, operation is reliable, the handling capacity is big, the treatment effect is good, and the processing procedure free from extraneous odour is excessive, and kitchen garbage makes a silk purse out of a sow's ear, realization eat innoxious, the utilization of kitchen wastes material.