High and low temperature tests, rapid temperature change tests, and environmental tests are used as a common means of testing to improve the reliability of electronic products. They are widely used in various research and development cycles of electronic products and they are used to determine the adaptability of communication equipment to the environment. In the course of environmental testing, according to the characteristics of the product, select the appropriate test method to inspect and evaluate the mechanical properties, electrical properties, physical properties, tensile strength and tensile resistance of the material, and insulation properties of the product. Only by choosing the correct test method and standard test conditions can the correct test results be obtained. In the process of constant humidity and heat, the product must be preheated to avoid the appearance of a large amount of condensation and cause additional stress, which affects the correct evaluation of the exp