Abstract: Inertia cone crusher is a energy saving, super-fine crushing equipment based on the principle of material-beds comminution. It can realize "selective crushing" and meet the requirements for "increase crushing and decrease grinding" technological flow sheet. It features high reduction ratio and low power consumption. It can crush friable materials of all kinds hardness. It is suitable for crushing various kinds metal ores. In the paper, the performance principle, structure of inertia cone crusher are briefly introduced. Article has enumerated the case which use inertia cone crusher to optimize crushuing process flowsheet of metal mine concentrating mill.