The invention discloses an efficient down feather processing dust collection device which comprises a tank body, a dust filtering net bag, a limiting device and a dust sucking device, wherein a fixingring A is connected with the upper end of the dust filtering net bag; a fixing ring B is connected with the lower end of the dust filtering net bag; the limiting device comprises a limiting ring anda hook which is arranged on a side wall of the limiting ring; the limiting ring is arranged at the upper end part of the dust filtering net bag; and the hook is arranged inside the dust filtering netbag and is fixedly connected with a hanging buckle. By adopting the efficient down feather processing dust collection device, dust is filtered by using the dust filtering net bag, and at a normal working state, the hook is fixed on the hanging buckle; the dust filtering net bag at the lower end of the limiting ring is at a straightened state, and thus effective dust collection is achieved; after acertain time, the hook is taken down from a pull ring, then the whole dust filtering net bag is at a loosened state, a long rod like structure extends into a feeding hole to flap the dust filtering net bag, then dust adhered to the upper end can fly out and is finally collected by using a dust collector, and thus the dust adhered to the dust filtering net bag is effectively prevented from influencing down feather dust collection efficiency.