Abstract: Through the MLA automatic detection, XRD and other measurements, the detailed mineralogical process studies on the Lingyang iron ore in Jilin Province were carried out to identify the chemical composition, mineral composition, grain composition and dissemination characteristics of the ore. The results showed that iron mainly occurs in form of magnetite and siderite, and small amounts of iron exists in chamosite and berthierine. Lingyang iron ores are refractory due to complex composition, fine disseminated and iron minerals locking closely with gangue mineral. The results may provide the basic references for the rational exploitation of the iron ore resources.