GB/T 2423.66-2025 "Environmental Testing—Part 2: Test Methods—Test: Combined Temperature/Humidity/Static Load" is applicable to the evaluation of polymeric materials and components for electrical and electronic equipment. It replaces the requirements of previous versions and achieves standardization for the integration of multiple environmental factors. This standard specifies test methods combining temperature, humidity, and static load (tension, compression, bending), clarifies technical indicators such as load control accuracy and temperature/humidity ranges, and requires that static load parameters be selected based on material characteristics. It standardizes requirements for test equipment, sample preparation and installation, test cycles, and inspection procedures. Combined parameters can be selected according to actual service environments, providing a unified standard for assessing the environmental adaptability of materials and components under complex conditions.