A pilot plant of dry anaerobic digestion was constructed in the dairy farm of Chinese Academy of Agricultural Mechanization Sciences. The plant included pretreatment system, solid feed-in system, horizontal anaerobic reactor, biogas storage and purification system, insulation warming system, and digestate discharging system. Specially designed low-speed horizontal rod-gear agitators used in the horizontal anaerobic reactor enhanced mass and heat transfer efficiency and overcame high solid feedstock feeding and discharging difficulties. Pilot-scale experiment of continuous dry thermophilic anaerobic digestion of dairy manure was conducted in the pilot plan. The experiment results showed that the pilot plant could efficiently dispose high solid dairy manure, and average volume biogas production was 3.0m3/(m3?d). 