Freshwater fish ecological cycle culture system

The utility model relates to the technical field of ecological circulation breeding, in particular to a freshwater fish ecological circulation breeding system which comprises a pond body, supporting seats are fixedly connected to the front side and the rear side in the pond body, a protection frame is fixedly connected to the tops of the supporting seats, and an isolation grid plate is fixedly connected to the bottom in the protection frame. Supporting blocks are fixedly connected to the upper portions of the left side and the right side of a supporting base arranged on the rear portion, a motor is fixedly connected to the tops of the supporting blocks, a lead screw is fixedly connected to a main shaft arranged right in front of the motor, a connecting base is rotationally connected to the outer side of the right in front of the lead screw, and the right in front of the connecting base is fixedly connected with the supporting base. Through the arrangement of the pond body, the protection frame, the supporting