Abstract: To Improve the beneficiation efficiency of transition magnetite ore from Tianxing Iron Mine，process mineralogy analysis was conducted on the ore.Results indicated that，the ore belongs to primary ore and transition oxidized ore，main valuable element is iron，iron mainly exists in form of magnetite and hematite.The main ore structure are euhedral-hypidiomorphic and xenomorphic granular variable crystal structure，crystal structure，metasomatism type residual and metasomatic pseudomorphic structure etc.Main ore texture including banded structure，stripe like structure，small rub corrugation structure etc.Iron minerals mainly disseminated in strip，banding state.The results can provide theoretical basis for process modification of Tianxing iron ore.

Key words: Process mineralogy, Dissemination characteristics, Transition zone, Martite