The invention discloses a pig feed additive and pig feed for reducing meat growth cost. The pig feed additive comprises coix seed bran and tea leaves. The tea leaves are added into the pearl barley bran, so that oxidative rancidity of the pearl barley bran can be slowed down, the storage time of the pearl barley bran is prolonged, and the technical problem that the pearl barley bran cannot be applied to feed is solved; the pig feed additive is added into the feed, so that the meat growth cost is remarkably reduced.