This standard specifies the periodic verification requirements for low temperature, low pressure, heat and humidity comprehensive sequential test equipment, including verification items, required instruments, verification conditions, measurement point arrangement, data processing and result judgment. It is suitable for verification of environmental test equipment for electrical and electronic products to ensure the Accuracy of equipment under complex conditions such as low temperature, low pressure, heat and humidity. Through the implementation of this standard, the verification process of related equipment can be standardized, the Reliability of equipment detection data can be improved, and technical support for environmental adaptability testing of electrical and electronic products can be provided.