The GB/T 9870.2-2008 standard focuses on the determination of the dynamic performance of vulcanized rubber or thermal plasticity rubber, using the low-frequency torsion pendulum method. The standard elaborates the specific steps for using this method to determine the dynamic performance of rubber, including equipment requirements, sample preparation and test procedures. Through this standard operation, the performance data of rubber under low-frequency dynamic conditions can be accurately obtained, which provides a key basis for the rational selection and performance optimization of rubber in application scenarios such as vibration and cushioning, and helps Rubber better meet the actual use needs.