Automatic drinking trough

The utility model relates to the technical field of drinking troughs, and discloses an automatic drinking trough which comprises a trough body and bottom troughs, a water pump is installed in the middle of the bottom of the trough body, an inlet and an outlet of the water pump are communicated with the interiors of the bottom troughs on the two sides through a water inlet pipe and a water return pipe respectively, and a filter basket is placed in the bottom trough connected with the water inlet pipe. A floating ball valve is installed on the inner side edge of the tank body and located on the upper portion of the inner side of the tank body, a blocking net is transversely fixed to the lower portion of the interior of the floating ball valve, and a hollow floating ball is arranged in the portion, above the blocking net, of the floating ball valve. According to the technical scheme, the bottom grooves are formed in the bottoms of the two sides of the groove body, the filter basket is placed in the bottom groove