The invention discloses a water-electricity separation type heating drinking trough which comprises a trough body, a water trough is arranged in the trough body, the section of the water trough is ina U shape, drain holes are formed in the bottoms of the two ends of the water trough, drain valves are installed at the drain holes, a water valve box is arranged on one side of the middle of the water trough, a water valve protection cover is installed on the top of the water valve box, a water supplementing port is formed in the side, close to the water trough, of the water valve box, a heatingplate is arranged at the bottom of the water trough, a differential pressure water valve is arranged in the water valve box, an angle valve is installed on the differential pressure water valve, a water temperature and water level sensor is arranged on one side of the differential pressure water valve, a heater installation groove is formed in the bottom of the trough body, and a heater is installed in the heater installation groove. Compared with the prior art, the water-electricity separation type heating drinking trough has the advantages that the problems of product deformation, freezing,failure of cleaning of dead corners, slant punching and failure of alignment of mounting holes, bitting of cables by animals, safety guarantee of animals or maintainers when a 220V heater is used in the drinking trough are solved, and the problem that a drinking trough using a heater at present is dry-heated is solved.