Abstract: The formation features of three kinds of abrasive debris were observed and the abrasive wear processes were studied under the given conditions using scanning electron microscope (SEM) , optical microscope and computer image-processing system. The results shown that in the case of abrasive wear the most of debris is chips and block-shape debris, and there are a little ball debris. The results indicated that: a. The chips are produced among the interaction between the abrasive particles and the material surface. Under the three body abrasive wear, the cutting is main reason of wear of the hard materials (3M and 2M) . It is an important wear form of material 4M and several austenitic manganese steel at high load condition. b. The plastic materials form the block debris after deforming many times, forming the block-shape debris is the major waar form of this kind of material under several given wear conditions. c. The high temperature from the contact between the abrasive particles and material surface results in the material fusion and sperical debris formation. Most of this kinds of debris is hollow with many holes on the surface, their formation is related to gases.