Abstract: To reasonable develop and use the ultra-poor magnetite in our country is very important to tap the potential and to improve the indemnification dedree of domestic iron ore resources. Also it is significant to ensure national economic security and to make sustainable development to economic in China. In this paper, the authors carry out research on ore process mineralogy of an ultra-poor magnetite in Chengde, Hebei province, and to study some mineralogical factors that affect the beneficiation indicators of iron ore from the ore characteristics and mineral composition, which have important guiding significance to ore beneficiation for the same type of iron ore resources.