Mulberry has great capability in bearing bad conditions. It can grow 1~1.5m in 5 months in Fengning County where the weather is drought, cold, wind and sand are strong. The mulberry forest can become in one year. So planting mulberries can gain great benefit for the environment. 15 kg. mulberry leaves can be transformed into 1 kg. fresh cocoons in one month, which cost 8~10 yuan, the cycle is short, but the economic profits is high. The mulberry leaf’s nutrition is abundant. The protein content is same as double of wheat’s. Mulberry leaves can be used as critter and fowl’s food, and mulberry and silkworm are both have medicine component and can be processed into hygienical food and medicine. So the society profits is high. Therefore mulberry has much predominance in the sustainable development of forestry.