NOVELTY - Pneumatic type stirring device comprises a stirring sleeve, where the stirring sleeve is fixed in the biogas fermentation system in upper part of air storing fermentation cell. The stirring sleeve is connected with air storage plate. The stirring sleeve in sliding sleeve is connected with pneumatic piston separating two fermentation zone. The pneumatic piston and piston connecting rod is connected with outside sleeve. The sleeve and stirring end out side wall is respectively connected with spring, and the outside sleeve is set with a stirring sleeve with outside wall.    USE - Used as pneumatic type stirring device.    DETAILED DESCRIPTION - Pneumatic type stirring device comprises a stirring sleeve, where the stirring sleeve is fixed in the biogas fermentation system in upper part of air storing fermentation cell. The stirring sleeve is connected with air storage plate. The stirring sleeve in sliding sleeve is connected with pneumatic piston separating two fermentation zone. The pneumatic piston and piston connecting rod is connected with outside sleeve. The sleeve and stirring end out side wall is respectively connected with spring, and the outside sleeve is set with a stirring sleeve with outside wall. The outside sleeve is connected with the step hole. The outside sleeve is fixedly connected with marsh gas ferment system, the fermentation tank body, a gas separating plate, stirring device. The fermentation tank is set with a fermentation chamber. The separating plate is provided with a fermentation chamber and inside is divided into U-type, the fermentation chamber and gas plate, the region between terminal plate and fermentation gas storage pool body is set between the feeding port and discharging port. The gas-guide tube, the gas storage is set between wall and pool body and fermentation gas storage plate in the side wall separating plate composed of stirring groove. The stirring device comprises stirring groove.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the pneumatic type stirring device.