Abstract: The largest scale underground mine with filling mining method at present in China is introduced.This mine is under Minmetals Hanxing Mining Co.Ltd.and it is located in Huoqiu County，Anhui Province.There are two ore deposits of magnetite and specularite in the mine.The ore-body is characterized with long strike，wide extension，large thickness and high inclination.According to the occurrence of the ore deposit，such issues are described as the choice of the development system，the mining method for large scale stoping，the structural parameters and characters of extra-large stope，the selection of mining sequence，the option of extra large mining equipments，the deliberation and construction of large scale filling systems，the choice of continuous and intermittent preparation system for filling pulps，and the control of the mining，the filling，and the strength of the filling body.The mine will be completed at the end of 12th Five-year Plan of China to be a model project.It provides experiences for extra large and super large underground mining for the future and forms the key technique for extra-large underground mine in China.

Key words: Extra large, Underground filling, Model mine, Construction