NOVELTY - A baffle-type special-flow-guiding anaerobic reactor comprises 4-6 anaerobic areas connected in series, divided into an acid-producing anaerobic area and a methane-producing anaerobic area. The acid-producing anaerobic area is in the front, and the methane-producing anaerobic area is behind. The anaerobic area is provided with an upflow area and a downflow area. Wastewater flows into the downflow area from the upper part of a first acidifying anaerobic area (10) to the bottom center communicated to the bottom center of the upflow area of a second acidifying anaerobic area (101).    USE - Baffle-type special-flow-guiding anaerobic reactor used for treating wastewater.    ADVANTAGE - In comparison with aerobic treatment, the anaerobic treatment of the wastewater is capable of saving 90% power, retains sludge which is only 10% of the sludge performed in aerobic treatment, increases the biochemical oxygen demand removal rate to greater than or equal to 90%, keeps the chemical oxygen demand removal rate at 70-90% more or less, converts most organic matters into biogas, saves the energy as well as produces the energy, and achieves a brilliant development prospect. The reactor is stable in treatment efficiency, and easy in management without blockage, not installing a three-phase separator. Thus, it is capable of making full large-scale wastewater treatment field and achieving a practical application.    DETAILED DESCRIPTION - A baffle-type special-flow-guiding anaerobic reactor comprises 4-6 anaerobic areas connected in series, divided into an acid-producing anaerobic area and a methane-producing anaerobic area. The acid-producing anaerobic area is in the front, and the methane-producing anaerobic area is behind. The anaerobic area is provided with an upflow area and a downflow area. Wastewater flows into the downflow area from the upper part of a first acidifying anaerobic area (10) to the bottom center communicated to the bottom center of the upflow area of a second acidifying anaerobic area (101) through a flow guiding pipe (60) to flow upwards. The wastewater flows upwards to pass through a flow guiding port on the upper part to flow downwards. Effluent flowing downwards to a flow gathering groove of the second acidifying anaerobic area is connected to a mixer of a second anaerobic area (20) through the flow guiding pipe. The mixer is connected with the second anaerobic area through an overflowing port. The second anaerobic area is connected with the flow gathering groove which is connected with a third anaerobic area (30) through the flow guiding pipe. The whole process after discharging the water from the flow gathering groove of the second acidifying anaerobic area is repeated till the wastewater is discharged outwards under the control of an effluent valve (73) of an effluent pipe (62) connected with a last anaerobic area (40) to flow into an after-treatment facility of the wastewater.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic view of baffle-type special-flow-guiding anaerobic reactor.    First acidifying anaerobic area (10)    Second anaerobic area (20)    Third anaerobic area (30)    Last anaerobic area (40)    Flow guiding pipe (60)    Effluent pipe (62)    Effluent valve (73)    Second acidifying anaerobic area (101)