The invention provides a 360-degree closed disc feeder. The 360-degree closed disc feeder comprises a box, a bait feeder, a screw feeding device, a feeding motor, a closed throwing disc, a fastener, a throwing motor base and a throwing motor. The whole feeder is mounted on a remotely controlled catamaran; after the throwing motor is powered on, the throwing disc rotates at a high speed; after the feeding motor is powered on, the screw feeding device pushes the bait to the feeding hole of the closed throwing disc from the bottom of the bait box. The bait falls into the storage region of the closed throwing disc from the feeding hole of the closed throwing disc; the bait is accelerated in the storage region by virtue of preliminary rotation and then goes into the accelerating rib plate of the throwing disc for further acceleration, and the completely accelerated bait is thrown from the circumference of the closed throwing disc. The feeder is applicable to feeding to the specific region of a prawn-farming pond or large-area feeding of a fishpond; the feeder is capable of reducing the breakage rate of the bait.