The invention discloses a pig feed trough convenient to clean. The pig feed trough convenient to clean comprises a base plate; the upper surface of the base plate is fixedly connected with the bottomend of a rotating shaft; the outer surface of the rotating shaft is sleeved with a bearing; the outer surface of the bearing is sleeved with a secondary gear; the two sides of the lower surface of thesecondary gear are each fixedly connected with a first pulley; and the bottom ends of the two first pulleys are both arranged inside a first sliding chute. The pig feed trough convenient to clean isprovided with a motor, a main gear, the secondary gear, a bearing, the rotating shaft, a second sliding chute, a second pulley, a slider, an electric drive push rod, a fixing plate and a hairbrush, wherein the secondary gear is used for driving the electric drive push rod and the hairbrush to rotate so that the hairbrush can be used for sweeping the inner wall of a shell, and thus the pig feed trough needs not to be swept manually by people, so physical strength of people is saved, clothes of people are not polluted, and conveniences are provided for people to sweep the pig feed trough; and when a pig needs to eat foods, the electric drive push rod is controlled to stretch to make the hairbrush extend out of the inside of the shell so as not to affect feeding of the pig.