The invention discloses an exercise training device for recirculating aquaculture fish and belongs to the technical field of test apparatus of exercise training for recirculating aquaculture fish. Thedevice comprises a device body and a water circulation system; the device body is provided with a water chamber therein; the chamber is divided into an upper fish exercise training chamber and a lower water quality processing chamber by a partition board; the water quality processing chamber is provided with a water processing system; The water circulation system comprises a water distributor capable of forming a circular flow in the fish exercise training chamber, a water pump capable of delivering water in the water quality processing chamber through the water distributor into the fish exercise training chamber and a return passage for water in the fish exercise training chamber to return to the water quality processing chamber. The device can also be used as a breeding experiment device instead of ordinary breeding box or barrel to protect environment and save water resources.