Constant-temperature fishpond

The constant-temperature fishpond comprises a heat preservation pond area sealed by a heat preservation material and an open-air conventional pond area, the heat preservation pond area and the conventional pond area are separated, through holes are formed in the interval areas, and the through holes are provided with a plurality of one-way opening and closing valves; a channel internally provided with water pumping equipment is further communicated between the heat preservation pool area and the conventional pool area, water flow between the two pool areas is blocked when the one-way opening and closing valve is closed, and the water pumping equipment guides the water flow to flow in the opposite potential difference mode after blocking. The built fishpond comprises a heat preservation pond area and a conventional pond area, wherein the heat preservation pond area is mainly used for conducting heat preservation on a target pond area under the cold condition in winter. In order to reduce the operation cost, th