NOVELTY - Fluidized bed reactor device comprises a reactor main body and a lamp light source (11). The reactor main body comprises a water inlet pipe (1), a water outlet pipe (2, an aeration pipe (3), an exhaust pipe (4), a reaction area, a settling area, a front transparent wall, a reflecting wall, a reflecting plate and filler. The reactor main body is divided into reaction area and settling area. The reaction area and settling area are separated through a reflecting baffle. The bottom of reaction area is set with a water inlet pipe. The upper part of settling area is set with water outlet pipe.    USE - The device is useful for organic waste water treatment.    ADVANTAGE - The device is simple, economical and easy to operate, has high optical energy utilization rate, saves energy, and increases the growth rate of micro organisms.    DETAILED DESCRIPTION - Fluidized bed reactor device comprises a reactor main body and a lamp light source (11). The reactor main body comprises a water inlet pipe (1), a water outlet pipe (2, an aeration pipe (3), an exhaust pipe (4), a reaction area, a settling area, a front transparent wall, a reflecting wall, a reflecting plate and filler. The reactor main body is divided into the reaction area and the settling area. The reaction area and settling area are separated through a reflecting baffle. The bottom of the reaction area is set with a water inlet pipe. The upper part of the settling area is set with the water outlet pipe. The aeration pipe and exhaust pipe are set at the top and bottom of the reaction area respectively. The aeration pipe is connected with the reaction area liquid. The exhaust pipe is connected with the upper space of the reaction area gas. The reaction area liquid phase is filled with the filler for the internal growth of microorganisms. The light through the transparent wall is irradiated on the biological filler, and the another part through the reaction area reaches the reflecting wall and a light reflecting plate.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the fluidized bed reactor device.    Water inlet pipe (1)    Water outlet pipe (2)    Aeration pipe (3)    Exhaust pipe (4)    Lamp light source (11)