The invention discloses a high-efficiency anaerobic fermentation structure which comprises a device main body, a fermentation device, a waste inlet device and an air outlet device, wherein the fermentation device is arranged in the device main body; the waste inlet device is arranged on the left side of the device main body; the air outlet device is arranged on the right side of the device main body; the waste inlet device comprises a crushing and fixing block which is fixedly arranged on an end face on the right side of the device main body; a crushing cavity vertically penetrates through theinterior of the crushing and fixing block; crushing rotation cavities having openings towards the crushing cavity are vertically and symmetrically formed in the inner side wall of the crushing cavity; rotating rings of which inner rings stretch into the crushing cavity are arranged in the crushing rotation cavities; the upper and lower end faces of the rotating rings are in normal running fit connection to inner walls on the upper and lower sides of the crushing rotation cavities by virtue of bearings; sealing rings are respectively arranged at the openings of the crushing rotation cavities and positioned between the upper and lower end faces of the rotating rings and the inner walls on the upper and lower sides of the crushing rotation cavities.