Abstract: The Anshan type sedimentary-metamorphic iron deposit in China is famous for "being large and poor". However, high-grade iron orebodies are hosted in many deposits in Anshan-Benxi region, among which the rich iron ore resources of Gongchangling deposit exceed one hundred million tons. With study on the distribution regularity and characteristics of typical high-grade iron orebodies, the authors recognize that the rich iron orebodies are formed by regional metamorphic reformation, distributed in the range of 85 km long from west to east and 25 km wide from north to south. The Mesozoic granites may also be involved in the formation of some rich iron orebodies.