Abstract: The Lala copper deposit of Sichuan is one of the important large deposits in SW China not only for Cu, but also for considerable economic amount of Au-Mo-Co-REE-Fe. Systematic ore mineralogy research shows that ore minerals are mainly composed of hydrothermal magnetite, chalcopyrite and molybdenite. The wall-rock alterations include biotitization, silicification,carbonatization, albitization, potash feldspathization, apatitization, actinolitization, fluoritization, etc. The ores have euhedralsubhedral-allotriomorphic crystalline grained texture, metasomatic relict texture, poikilitic texture, and dendritic texture, and have disseminated, banded, vein-stockwork and breccia structures. Copper is mainly found in chalcopyrite, cobalt mainly in pyrite and marcasite, molybdenum mainly in molybdenite and gold mainly in chalcopyrite, pyrite and pilsenite as native or silverbering native gold. The contents of Ti in magnetite and S in ore are low, with a very small amount of Pb-Zn sulfide minerals.Consequently, the Lala copper deposit is a typical iron oxide-Cu-Au (IOCG) deposit.