NOVELTY - Producing biogas through utilizing a lignocellulose raw material, involves: adopting a diluted acid hydrolysis method to hydrolyze the lignocellulose raw material so as to obtain a hydrolysate containing water-soluble organic matters, then regulating the pH, and filtering to obtain the hydrolysate clear liquid; adding water to dilute, and adding nitrogen and phosphorus nutrient substances to ferment the raw materials; adding an anaerobic fermentation strain into an anaerobic reactor, continuously and anaerobically fermenting.    USE - The method is useful for producing biogas through utilizing a lignocellulose raw material (claimed).    ADVANTAGE - The diluted acid is adopted to hydrolyze the lignocellulose raw material so as to obtain the water-soluble organic matters, so that the biogas production rate and biogas production efficiency are increased; a feeding mode for biogas fermentation is a liquid feeding mode, so that the fermentation scale can be broadened according to practical requirements; and the method can be popularized in not only rural areas but also towns and cities on large scale.    DETAILED DESCRIPTION - Producing biogas through utilizing a lignocellulose raw material, involves: adopting a diluted acid hydrolysis method to hydrolyze the lignocellulose raw material so as to obtain a hydrolysate containing water-soluble organic matters, then regulating the pH to be 5.5-10.0, and filtering to obtain the hydrolysate clear liquid 2000-25000 mg/L; adding water to dilute, and adding nitrogen and phosphorus nutrient substances to ferment the raw materials, fermentation of raw materials in the C/N mass ratio of 50-500:5, C/P mass ratio is 50-500:1, the anaerobic representing an oxygen reactor, the reactor volume of 10-80% of the strains of anaerobic fermentation; adding an anaerobic fermentation strain into an anaerobic reactor, continuously and anaerobically fermenting, and maintaining the fermentation raw materials in the anaerobic reactor for 3-20 hours, where the fermenting temperature is 15-50 degrees C.