This standard specifies the test method for determining the resistance to ozone cracking of vulcanized rubber or thermoplastic rubber under dynamic tensile conditions. Its core principle involves placing specimens in an ozone aging test chamber with constant ozone concentration and temperature, subjecting them to periodic dynamic tensile deformation to simulate stress conditions encountered in actual use, thereby evaluating the material's ability to resist ozone-induced cracking. The key instruments required for this test are an ozone aging test chamber and a specimen fixture that enables dynamic stretching of the specimens at a specified frequency (e.g., 0.5 Hz). This method provides an important technical basis for evaluating the service life of rubber products (such as tires, seals, hoses, etc.) in ozone-containing environments.