Abstract: Based on analysis of the grinding shortcomings associated with brown emery wheel of the rollers skew tooth top-surface,a method was proposed,which used CBN grinding wheel in substitution for traditional brown emery wheel.The structural features and size structure of CBN grinding wheel were determined and a set of diamond wheel trimming device for the CBN grinding wheel was designed.An in-depth research on the CBN wheel′s dressing parameters was performed.Practical use indicates that CBN wheel grinding the top-surface of rollers skew tooth has made the grinding precision and surface quality greatly improved,no phenomenon of grinding burn.The endurance of CBN grinding wheel has been enhanced significantly and the life of it is more than 50 times of that of the brown emery wheel.