The invention provides a fully-closed stranding cage feeder. The fully-closed stranding cage feeder comprises a dustproof cover, a carrier rack and a feeding spindle, wherein the dustproof cover is made of flexible rubber and covers an opening in the upper end of a storage barrel, and a vertically through cross hole is formed in the middle of the dustproof cover; at least one lifting rod is fixedly connected to the upper end of the carrier rack; when the carrier rack is disposed inside the storage barrel, the upper end of the lifting rod penetrates through the cross hole, and the upper end ofthe lifting rod is fixedly connected with a handle; and the feeding spindle is rotationally connected to the interior of a feeding body, and the portion, below the carrier rack, of the feeding spindleis fixedly connected with a bag breaking cutterhead. According to the feeder for rubber production, opening or closing can be completed while the carrier rack is lifted up or placed down, and the labor intensity of operators is relieved. The bottom of a bag installed into the carrier rack protrudes downwards, and the bag is broken automatically after the dustproof cover is closed, so that on theone hand, the processing environment is protected against pollution, and on the other hand, the material loss and waste are effectively reduced.