Constant-temperature anaerobic biogas digester

The utility model relates to the technical field of biogas digesters, in particular to a constant-temperature anaerobic biogas digester which comprises a base plate, a biogas barrel arranged above the base plate, a heat preservation barrel sleeved on the outer wall of the biogas barrel, a top cover arranged at the top of the biogas barrel, a motor arranged at the center of the upper surface of the top cover, and a scraping plate arranged at the bottom of a main shaft, universal wheels are arranged on the lower surface of the base plate close to the edge, an observation window is embedded in the outer wall of the biogas cylinder, and a hollow area between the inner wall and the outer wall of the biogas cylinder is a water bath layer; according to the constant-temperature anaerobic biogas digester, the base plate with the universal wheels is arranged, the biogas barrel is sleeved with the heat preservation barrel and installed on the base plate, arrangement and flexible movement are facilitated, the water bath