///By the dissolubility experiment of low-valence iron, the low sulfur high-valence iron and the high sulfur bauxite in the Maochang of Qingzhen, it shows: the high sulfur bauxite, the high-valence iron bauxite belongs to the bauxite deposit, which is hard to use. In this paper, it introduced the reserve, which is hard to use of the bauxite belt, and the degree and deficiency in Qingzhen, Xiuwen of middle