Abstract: The fractured wires were found in servicing steel wire rope,which used in port machine.The fracture wires reason was analyzed by chemical composition analysis,mechanical properties test,fracture observation,metallographic examination and microhardness test,etc.The results show that fracture characteristic was fatigue.The fracture origin was in the zone of surface abrasion and squeeze-peeling.The reason caused early fracture wires involved the defects of surface abrasion,squeeze-peeling and a little ferrite in fracture wires.