Continuous culture device for plankton

The utility model provides a continuous culture device for plankton, comprising a base, an external glass pipe arranged on the base, an internal glass pipe arranged at the internal side of the external glass pipe, and a clapboard arranged at the internal side of the external glass pipe; an annular containing chamber is arranged between the internal glass pipe and the external glass pipe; the clapboard is arranged in the containing chamber so that the containing chamber is divided into a water inlet chamber and a water outlet chamber; the external glass pipe is provided with a water inlet and a water outlet, wherein the water inlet is communicated with the water inlet chamber; the water outlet is communicated with the water outlet chamber; and the water inlet is higher than the water outlet. In the continuous culture device, the continuous culture device for the plankton has the advantages of meeting the requirement of constant concentration of nutrient salt, increasing dissolved oxygen in a nutrient solution,