The lowtemperature ion sulphurizing technology was employed to prepare the sulphurized lubricating layer on the surface of the GCr15 steel balls so as to improve its triological properties. The triological properties of the sulphurized samples under dry and oil lubrication condition were investigated by using a fourball friction tester and compared with those of unsulphurized samples. Results show that the friction coefficient of the sulphurized samples is much lower than that of unsulphurized sample under dry friction or oil lubricated condition.The wear rate of sulphurized samples is greatly reduced than that of unsulphurizeds sample under the dry friction condition, which is mainly attributed to the excellent friction reducing and antiwear properties of the sulfurizing layer. Under the oil lubricated condition, due to the mutual coordination function of oil lubrication and solid lubrication of the sulfurizing layer, the triological properties of the sulphurized samples are obviously superior than that of the unsulphurized samples. The wear surface of the sulphurized samples has light and shallow scar, and the wear mechanism is light particle wear. 