The present invention relates to a water supply device for livestock in which water heated in the storage tank is supplied to the drinking water tank through a water supply tank by configuring the storage tank to be heated when the drinking water tank is heated by providing a storage tank at the bottom of the drinking water tank. The water supply device for livestock of the present invention includes a water supply device main body (1)； The upper one side of the water supply device main body 1 is installed with an open upper part, and a protective cover 11 is coupled so that only the upper side is divided into a state in which the lower side is in communication with each other in the opened upper central part Drinking water container 10 for receiving the water supplied through 15)； A storage tank (20) installed adjacent to the lower surface of the drinking water tank (10) and receiving and storing water through the second water supply pipe (25)； A heater 30 installed in close contact with the lower surface of the drinking water container 10 and the upper surface of the water storage tank 20 to heat the drinking water container 10 and the water storage tank 20 together； The drinking water tank 10 is connected to the water storage tank 20 and the third water supply pipe 45 to receive the water from the water storage tank 20 heated by the heater 30, and supplies the supplied water to the drinking water tank 10. ) And the first water supply pipe (15), the water level control valve (41) installed so as to fill only a set amount of water supply tank (40)； A check valve 50 installed in the first water supply pipe 15 to prevent the water supplied to the drinking water container 10 from flowing back into the water supply tank 40； It consists of； a control unit 60 for controlling the on-off operation of the heater 30 and supply of water.본 발명은 음용수통의 하부에 저수조를 구비하여 음용수통의 가열 시 저수조가 가열되도록 구성함으로써 저수조에서 데워진 물을 급수조를 거쳐 음용수통으로 공급해 주도록 한 가축용 급수장치에 관한 것이다.본 발명의 가축용 급수장치는 급수장치 본체(1)； 상
