Automatic water drinking device for live pig breeding

The utility model discloses an automatic water drinking device for live pig breeding, which relates to the technical field of live pig breeding and comprises a water tank, a water trough is fixedly connected to the lower surface of the water tank, the right side of the lower surface of the water tank is communicated with the top end of a pipeline, and a water stop plug is arranged in the pipelineand matched with the inner wall of the pipeline. According to the automatic water drinking device for live pig breeding, by arranging the piston, the spring, the fixing rod, the traction rope, the pulley and the pull ring, people manually pull the pull ring to drive the traction rope to move leftwards, under the action of the pulley, the traction rope drives the piston to move upwards, water in the water trough can be drained through the water drainage pipe, and after water in the water trough is replaced, the water can be drained out. The piston can clamp the drain hole again under the actionof the tension of the spr