NOVELTY - An anaerobic reaction device comprises upper and lower layers of three-phase separators connected in series, where a tank is provided with a water inlet (1) at the bottom and a first anaerobic reaction chamber (2) at the lower side. The first layer (3) of three-phase separators is installed on the first anaerobic reaction chamber, at the same time, a second anaerobic reaction chamber (4) is located at the upper side of the tank and provided with a second layer (7) of three-phase separators. A gas liquid separator (9) is installed on the top of the tank.    USE - Anaerobic reaction device used for treating waste percolate (claimed).    ADVANTAGE - Because of the upper and lower layers of three-phase separators, the device strengthens the biogas collecting capacity and enhances the internal circulation of the reactor. The internal circulation amount can be 5-10 times of the water inflow. At the same time, the reactor has relatively high upflow velocity and can maintain the concentration of the particle sludge effectively under the relatively high upflow velocity (6-12 m/hour), improve the sewage treatment efficiency and keep the best living environment for the anaerobic bacteria. At the same time, the device also has high stability and load in highly concentrated waste percolate.    DETAILED DESCRIPTION - An anaerobic reaction device comprises upper and lower layers of three-phase separators connected in series, where a tank is provided with a water inlet (1) at the bottom and a first anaerobic reaction chamber (2) at the lower side. The first layer (3) of three-phase separators is installed on the first anaerobic reaction chamber, at the same time, a second anaerobic reaction chamber (4) is located at the upper side of the tank and provided with a second layer (7) of three-phase separators. A gas liquid separator (9) is installed on the top of the tank. A lifting pipe (5) is arranged between the first layer of three-phase separators and gas liquid separator, while a water outlet (6) connected with the outside of the tank is installed on the second layer of three-phase separators. A gas collecting pipe (8) is connected with the second layer of three-phase separators and gas liquid separator. An air guiding pipe (10) is processed on the top of the gas liquid separator, while a reflow pipe (11) connected with the bottom of the first anaerobic reaction chamber is arranged at the bottom.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic perspective view of the anaerobic reaction device with upper and lower layers of three-phase separators.    Water inlet (1)    First anaerobic reaction chamber (2)    First layer of three-phase separators (3)    Second anaerobic reaction chamber (4)    Lifting pipe (5)    Water outlet (6)    Second layer of three-phase separators (7)    Gas collecting pipe (8)    Gas liquid separator (9)    Air guiding pipe (10)    Reflow pipe (11)