Grinding is one of the important supports for the development of modern equipment manufacturing industry.However,in the process of grinding,especially in precision and ultra-precision grinding,grinding scratches occur from time to time,which seriously puzzles the application and development of grinding technology.To this end,through a large number of grinding sites and parts surface grinding scratch detection and measurement,combined with cutting,tribology,physics,materials,imaging related knowledge,all kinds of grinding scratches in grinding engineering were carded and analyzed comprehensively.The main technical characteristics of grinding scratches were investigated;based on the two grinding methods of grinding wheel peripheral grinding and end face grinding,the formation processes of single abrasive grain grinding scratches and agglomerate abrasive grain grinding scratches were revealed,the main factors influencing grinding scratch were summarized,and the technical measures were put forward.