The invention discloses a feedstuff feeding device. The feedstuff feeding device comprises a machine frame, wherein a storage tank is arranged at the upper end of the machine frame, a pipeline communicating with rearing cages is arranged at the lower end of the machine frame, a movable block which can move up and down is arranged at the axis of the middle part of the machine frame, two side faces of the movable block are inclined faces, guiding rods are mounted at the front and rear ends of the movable block in a liftable manner and are fixedly mounted in the machine frame, a stud is mounted at the middle part of the machine frame in a rotatable manner and is in threaded fit with the movable block, two groups of shifting blocks which are opposite relative to the movable block are mounted in the machine frame in a left and right shifting manner, and each group of shifting blocks comprises a plurality of switch blocks.