Abrasives are one of the industries with strict requirements for particle size. We have learned from various abrasive export companies that importers in developed countries such as the United States, Germany, and Japan mostly use laser particle size analyzers as instruments for daily abrasive particle size detection. The national standard instrument for abrasives in Japan is the Coulter counter (resistance method). It can be seen that in the abrasive industry, there are multiple instruments with different principles being used simultaneously. However, in practical applications, the measurement results of different instruments on the same sample are often different. This article briefly introduces the principles and performance characteristics of various popular particle instruments at home and abroad.