It can rapid drying moisture from 65-75% to 14-18% in one-time. Dry grass completely retained the nutrients of fresh pasture, bright color, smell fragrance, energy-saving 30-50% than the ordinary dryer, can maximize energy conservation and drying costs. Suitable for drying elephant grass, alfalfa, wheat straw, barley straw, oat straw, rye straw, rice straw, sorghum stalks, corn stalks, potato vines, beanstalks, and 45-75% moisture of pasture straw.