The invention relates to the technical field of livestock farming, and discloses a livestock farming water supply tank convenient to use. The livestock farming water supply tank convenient to use comprises a water supply tank body; a supporting frame is fixedly mounted on the right side of the top of the water supply tank body; a connecting rope is arranged at the bottom of the supporting frame in a surrounding manner; the bottom end of the connecting rod is arranged on a thermometer in a surrounding manner; the bottom end of the thermometer is positioned in the water supply tank body; an activated carbon adsorption plate is arranged in the water supply tank body; filtering nets are arranged in the water supply tank body and are positioned on the upper side and the lower side of the activated carbon adsorption plate. According to the livestock farming water supply tank convenient to use, a system is formed by a first hinge seat, a hydraulic telescopic rod and a second hinge seat and is matched with a system which is formed by a movable connecting seat and a supporting rod, so that the water supply tank body can be inclined at a certain angle to facilitate continuous drinking of livestock by stretching the hydraulic telescopic rod after the livestock drink for a period of time and the water level is reduced obviously; therefore, resources are saved; the livestock farming water supply tank is more convenient to use.