NOVELTY - Fermentation system comprises inlet and outlet material cylinder, annular fermentation pipe and main body. The oil inlet and outlet cylinders are vertically connected to the annular fermentation material pipe and a material cylinder is provided between feedstock tube and discharging tube. The vertical feedstock tube and discharging tube extends to the bottom of fermentation pipe and are separated by clapboard.    USE - Fermentation system for producing biogas.    DETAILED DESCRIPTION - Fermentation system comprises inlet and outlet material cylinder, annular fermentation pipe and main body. The oil inlet and outlet cylinders are vertically connected to the annular fermentation material pipe and a material cylinder is provided between feedstock tube and discharging tube. The vertical feedstock tube and discharging tube extends to the bottom of fermentation pipe and are separated by clapboard. The fermentation pipeline (30) is mounted at the top and feedstock pipe (10) is connected with pipe containing water and the discharging pipe is connected with the discharging tube between drain pipe. The annular pipe and fermentation feedstock pipe are connected to the feedstock tube plate. The annular fermentation pipe and discharging pipe are connected to the discharging pipe plate. The discharging pipe blocking plate (34) and feedstock material blocking plate (32) between the tube is formed with one of plate between the adjacent blocking plate forming cell fermentation. The top part of fermentation area is set with mutually independent air pipe (36) set with valve. The discharge pipe on water discharging pipe is set with control discharging pipe and the biogas slurry flows into the one-way check valve with water pressure. The feedstock pipe and discharging water pipe are set with control over water pressure and marsh liquid flows in one-way flow into the feedstock tube.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the fermentation system.    Feedstock pipe (10)    Fermentation pipeline (30)    Feedstock material blocking plate (32)    Discharging pipe blocking plate (34)    Air pipe (36)