本文介绍了旁通阀罗茨真空泵的结构特征、在使用中的作用。综述了该泵的极限压力，抽气速率、零流量压缩比、最大允许压差、噪声等性能的测量方法和测试过程。所选用的测量仪器及在测试过程中应注意的几个问题，文中对此也进行了详细的探讨。为旁通阀罗茨真空泵正确进行各项性能测量、可起到参考作用。 This article describes the structure of the bypass valve Roots vacuum pump features in use. The measuring methods and testing process of the pump such as the ultimate pressure, the pumping rate, the zero flow compression ratio, the maximum allowable pressure drop, the noise and so on are summarized. The choice of measuring instruments and in the testing process should pay attention to several issues, this article also conducted a detailed discussion. For the bypass valve Roots vacuum pump correctly measure the performance, can play a reference role.