NOVELTY - A two-phase integrated anaerobic reactor comprises a reactor (1), a water inlet (2), a water outlet (3), a gas collecting hole (4), a sludge discharging port (5), a flow guide pipe (6) and a separator (7). The reactor comprises a hydrolysis acidizing pond (1a) and a methane producing pond (1b) arranged from left to right. The flow guide plate and the separator are vertically arranged in the hydrolysis acidizing pond for forming an S-shaped water flow channel comprising a lifting cell (11b) and a descending cell (11a) which is narrower than the lifting cell.    USE - Two-phase integrated anaerobic reactor.    ADVANTAGE - The anaerobic reactor uses an integrated reactor, which finishes the steps of hydrolyzing and acidizing phase and produces methane in a reactor, thus, the number of the reactor is reduced, and the coverage area is saved. With an S-shaped water flow channel and a flow guide plate with a bent part at the lower end, the mixing degree of the water and the sludge is improved, and the treatment effect of the reactor is improved. Since the water inlet is higher than the water outlet, the system basically does not consume the energy.    DETAILED DESCRIPTION - A two-phase integrated anaerobic reactor comprises a reactor (1), a water inlet (2), a water outlet (3), a gas collecting hole (4), a sludge discharging port (5), a flow guide pipe (6) and a separator (7). The reactor comprises a hydrolysis acidizing pond (1a) and a methane producing pond (1b) arranged from left to right. The flow guide plate and the separator are vertically arranged in the hydrolysis acidizing pond for forming an S-shaped water flow channel comprising a lifting cell (11b) and a descending cell (11a) which is narrower than the lifting cell. The lower end of the flow guide plate is provided with a bent part of 40-45 degrees . The lower part of methane producing pond is communicated with the hydrolysis acidizing pond. The water inlet is higher than the water outlet.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic view of a two-phase integrated anaerobic reactor.    Reactor (1)    Hydrolysis acidizing pond (1a)    Methane producing pond (1b)    Water inlet (2)    Water outlet (3)    Gas collecting hole (4)    Sludge discharging port (5)    Flow guide pipe (6)    Separator (7)    Descending cell (11a)    Lifting cell (11b)