NOVELTY - A double-hydraulic anaerobic reactor comprises upper and lower crowns, and a methane guide port that is equipped at the center of the top of the upper half-cover of the crown; where the upper half-cover and a lower half-cover of the crown are bonded to form a main pool; the double hydraulic chambers are symmetrically mounted on left and right sides of the upper half-cover of the crown; and the left and right sides on the same circle diameter of the upper half-cover of the crown are symmetrically equipped with through holes indirectly communicating with hydraulic chamber.    USE - The double-hydraulic anaerobic reactor is useful for industrial and commercial applications.    ADVANTAGE - The double-hydraulic anaerobic reactor has raw material pre-treatment process that is increased by setting symmetrical structures of double-hydraulic chambers; where as the material feeding and discharging ports are set as hydraulic chambers, the pressure stability of reactor is improved; the stress of the whole structure is balanced; it has good balance and stability; and the service life is prolonged. Moreover, the bonding structure of the double-hydraulic anaerobic reactor is scientific; where it has good sealing property and heat preservation. Additionally, it has high gas yield, gas producing rate and high methane concentration; where the whole structure has high standardization and industrialization.    DETAILED DESCRIPTION - A double-hydraulic anaerobic reactor comprises upper and lower crowns, and a methane guide port that is equipped at the center of the top of the upper half-cover of the crown; where the upper half-cover and a lower half-cover of the crown are bonded to form a main pool; the double hydraulic chambers are symmetrically mounted on left and right sides of the upper half-cover of the crown; the left and right sides on the same circle diameter of the upper half-cover of the crown are symmetrically equipped with through holes indirectly communicating with hydraulic chamber; the through holes are in the tangential section on the lower end of the upper half-cover of the crown; the circumferences of the through holes are equipped with a connecting face bonded with the bottom of the hydraulic chamber; the arc edge on the inner side of the connecting face is equipped with a wall surface holding against the side face of the hydraulic chambers; an upper flange is mounted on the circumference of the lower end of the upper half-cover on the crown matching with the circumference of the upper end of the lower half-cover; the circumference of the upper end of the lower half-cover of the crown is equipped with a lower flange matching with the circumference of the lower end of the upper half-cover on the crown; the two hydraulic chambers are mounted on left and right through holes in the upper half-cover of the crown; and the bottoms of the hydraulic chambers are equipped with material feeding and discharging ports tightly bonded with the edges of the through holes.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the double-hydraulic anaerobic reactor.