Method of producing biogas through solid fermentation of animal feces

The invention discloses a method of producing biogas through solid fermentation of animal feces. The method is characterized by comprising following steps: (1) grinding straws to obtain a material (A); (2) fermenting animal feces to obtain a basic material for biogas fermentation; (3) mixing the basic material, the material (A) and a material (B) according to a ratio of 1:2-4:3-5 to obtain a material (C); (4) adding the material (C) into a fermentation tank, carrying out anaerobic fermentation, in the primary stage of fermentation, spraying an aspergillus oryzae solution by a high pressure atomization device; spraying water by a high pressure atomization device every 2 to 3 days during the fermentation period so as to keep a wet state of the material (C), every 8-10 days, starting a negative pressure generating device to collect biogas, after biogas is collected, stopping the negative pressure generating device, and then starting a high pressure atomizing device to spray a sodium thiosulfate solution. The met