GB/T 20236-2025 "Method for accelerating outdoor exposure test of non-metallic materials" is a national standard to be implemented on October 1, 2025. It is suitable for accelerating the weathering resistance assessment of non-metallic materials such as plastics, rubber and coatings. The standard enhances natural sunlight irradiation through a concentrated reflection device to simulate the long-term outdoor aging effect. It specifies core requirements such as test equipment, sample preparation, radiation intensity, temperature Humidity cycle and exposure cycle, focusing on Light spectrum matching, sample installation angle, environment parameter monitoring and other indicators. Compared with the traditional xenon arc test, this method retains the authenticity of the natural Light spectrum, adds online Light spectrum monitoring, dynamic Humidity compensation technology, optimizes the data collection Frequency and aging level judgment criteria, and improves the test efficiency and Reliability of results.