NOVELTY - Device for processing waste containing high cellulose e.g. crop straw, energy plant, rubbish and cattle excrement to produce biogas, comprises a feeding pipe, a biogas fermentation tank, a discharge port, a discharge pipe, a water seal, solid-liquid separating tank and a biogas collecting pipe. The processing method of waste containing high cellulose e.g. crop straw, energy plant, rubbish and cattle excrement to produce biogas comprises e.g. conveying the raw material into biogas fermentation tank through its bottom, and performing microbial fermentation of raw material to produce biogas.    USE - The device is useful for processing waste containing high cellulose e.g. crop straw, energy plant, rubbish and cattle excrement to produce biogas. The produced bio gas is useful for power generation or as fuel for households.    ADVANTAGE - The device does not require stirring process, consumes less energy, easily discharges the slag, and ensures high adaptability of raw material.    DETAILED DESCRIPTION - Device for processing waste containing high cellulose e.g. crop straw, energy plant, rubbish and cattle excrement to produce biogas, comprises a feeding pipe, a biogas fermentation tank, a discharge port, a discharge pipe, a water seal, solid-liquid separating tank and a biogas collecting pipe. The processing method of waste containing high cellulose e.g. crop straw, energy plant, rubbish and cattle excrement to produce biogas comprises conveying the raw material into the biogas fermentation tank through its bottom, performing microbial fermentation of raw material to produce biogas under the effect of feeding thrust force, buoyancy, biogas lifting force and flushing stream impulsive force, passing the scum into the discharge pipe through the biogas fermentation tank outlet under the pressure of gravity and gas, discharging the solid-liquid material and scum along the discharge pipe from the discharge water sealing pool, conveying the discharged material into solid-liquid separating tank for separating solid from liquid, conveying the large part of the separated biogas slurry into a mixing pool, where the diluted fermented raw material, biogas residue and small part of biogas slurry is used as farmland fertilizer, passing the biogas from the discharging pipe into biogas collecting pipe, and purifying.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the device for processing waste containing high cellulose e.g. crop straw, energy plant, rubbish and cattle excrement to produce biogas.