NOVELTY - This new utility model claims of biogas one-way flow lifting biogas liquid turbulent flow effect of marsh gas ferment device, wherein comprising, the feedstock tube, discharging tube, U type fermentation pipe, U type pipe horizontal placing for fermentation, feedstock tube and discharging tube vertical U-type fermentation pipeline connected with two end side, U type pipe upper part set hydraulic pressure ferment, and feedstock pipe connecting seat for feedstock pipe drainage hole, and a discharge tube connected with position for discharging pipe drainage hole, a U type pipe and fermentation feedstock pipe connecting seat is set with one feedstock to tube plate, U type fermentation pipe and discharging pipe connected with seat position is set with one discharging tube plate, upper U type pipe is set with fermentation has set air pipe, in also connected with cloth water pressure device fungus, bacteria distributing device of drain pipe, a U type cloth tube fungus, fungus hole composed of cloth, from feedstock tube and discharge tube one end side connected with bacteria distributing device of drain pipe, arrange the other end side connected with fixed water pipe of each suitable for the U-type inner pipe cloth ferment fungus tube, U type cloth tube and shape of fungus ferment pipe and extending to ferment in pipeline. Upper one-way valve, a discharging pipe drainage hole in U-type pipe of Brucella with multi-set of vertical direction of the cloth fungus hole; feedstock pipe drainage hole set with control of water pressure in the biogas liquid one-way flow into feedstock pipe is set with control discharging pipe and liquid one-way flow into the one-way valve in water pressure, water pipe and arrange device of Brucella has control and is set with one-way in fermented biogas slurry pipe flow into the one-way valve in water pressure, water bacteria distributing device is the lowest discharging pipe drainage hole at the horizontal plane is higher than the lowest point of the horizontal plane.