作为砂轮修整器的材料，PCD在性能上接近单晶金刚石，而在价格上却相对便宜得多．通过用三角形PCD修整器对氧化铝砂轮的修整，采用磨耗比作为评定指标，分析了修整器在修整过程中的三个磨损阶段，即初期磨损、稳定磨损和剧烈磨损，并提出了造成修整器磨损的原因，除机械磨损外，还有金刚石微晶粒的破碎脱落和高温下的石墨化磨损通过分析修整器磨损对修整效果的影响，提出适当地修磨修整器负倒棱可以缩短初期磨损阶段，并且适当控制修整器的磨损极限可以改善砂轮的修整效果． As a material for wheel dressers, PCD approaches the performance of single-crystal diamonds and is relatively cheaper in price. By trimming the alumina grinding wheel with a triangular PCD dresser and using the wear ratio as the evaluation index, the three wear stages of the dresser during the trimming process, namely initial wear, stable wear and severe wear, are analyzed. In addition to mechanical wear and tear, as well as broken and shedding of diamond micrograins and graphitization wear at high temperature, the effects of the dresser wear on the trimming effect are analyzed. It is suggested that proper grinding of the dresser negative chamfer can shorten the initial wear Stage, and proper control of the dresser wear limit can improve the grinding wheel dressing effect.