NOVELTY - An integrated biological hydrogen preparing device comprises outer circulatory water bath area (22) in between an outer cylinder and an inner cylinder; reaction area II (2) in inner cylinder, lower section of the reaction area II mounted with a crossed water-in pipe (19) and a connected water-in pipe (18) connected to a circulatory water-out pipe (24), water pipes (20, 33) accessed to the reaction area II from the side; and reaction area I (1) in cylinder and inclined wall (37), and upper side communicates with deposition area.    USE - Integrated biological hydrogen preparing device.    ADVANTAGE - The device can not only process the wastes difficult to degrade, but also uses small area.    DETAILED DESCRIPTION - Integrated biological hydrogen preparing device comprises outer circulatory water bath area (22), up-flow reaction area, completely mixed reaction area, deposition area, water-in and water-out parts and gas-out system. The outer circulatory water bath area is in between an outer cylinder (16) and an inner cylinder (17). The outer circulatory water bath pipes comprise water-out pipe (26) and a water-in pipe (32). A reaction area II (2) is the area in inner cylinder, the lower section of the reaction area II mounted with a crossed water-in pipe (19) and connected water-in pipe (18) connected to a circulatory water-out pipe (24), water pipes (20, 33) accessed to the reaction area II from the side. The upper section of the reaction area II is mounted with a three-phase separator consisting of a cylinder and a pipe socket (34) and a water-out triangular weir (25). The inner side of upper water-out weir is mounted with a cylinder. A reaction area I (1) is in cylinder and inclined wall (37), lower side is connected to a water-in pipe (3), upper side communicates with the deposition area; cylinder and pipe socket (8) form the three-phase separator of reaction area I, whole body mounted with a water-out triangular weir (9), upper section has a cover plate (13), inner side of the water-out weir and upper cover plate connected to cylinder; cover plate mounted with a stirrer (14), lower side of the stirrer connected to a stirring paddle (4). The cover plate is inserted with a temperature control probe (5) which is connected to the external thread of the reactor, and arranged with gas-out holes (29, 28, 10, 11), lower water-in pipe (20) connected to the upper water-in pipe (12) and total water-out pipe (31), and sample ports (30, 23, 21, 33).    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the integrated biological hydrogen preparing device.    Reaction area I (1)    Reaction area II (2)    Water-in pipe (3)    Stirring paddle (4)    Pipe socket (8)    Upper water-in pipe (12)    Cover plate (13)    Stirrer (14)    Crossed water-in pipe (19)    Lower water-in pipe (20)    Water pipes (20, 33)    Outer circulatory water bath area (22)    Circulatory water-out pipe (24)    Water-out triangular weir (25)    Water-out pipe (26)    Gas-out holes (29, 28, 10, 11)    Sample ports (30, 23, 21, 33)    Water-in pipe (32)    Inclined wall (37)