以粒子计数器为测试手段的粒径效率测试法是目前过滤器测试的主要方法。通过对粒子计数器测试原理和误差的分析 ,指出了粒子计数器使用中应注意的一些问题。 Particle counter as a test method of particle size efficiency test method is the main method of filter test. By analyzing the test principle and error of the particle counter, some problems that should be paid attention to when using the particle counter are pointed out.