Microalgae culture device

The utility model relates to a microalgae culture device which comprises a culture device body, a liquid distribution plate is arranged in the culture device body, an illumination lamp tube is arranged in the center of the bottom of the liquid distribution plate, a plurality of liquid distribution pipes are arranged on the liquid distribution plate, a culture solution inlet is arranged on the side wall of the culture device body above the liquid distribution plate, and a microalgae feed port is arranged on the side wall of the culture device body below the liquid distribution plate. A discharge port is formed in the bottom of the incubator body, an annular gas distribution pipe is arranged at the lower end in the incubator body, a plurality of aeration heads are uniformly distributed on the circumference of the annular gas distribution pipe, the annular gas distribution pipe is connected with a gas header pipe, a cleaning part is arranged outside the illumination lamp tube in the incubator body, and a tempera