This is a product standard for key core materials in the field of green hydrogen production. It specifies the classification and labeling, technical requirements, test methods, inspection rules, and subsequent packaging, storage, and transportation specifications for proton exchange membranes used in electrolytic water hydrogen production systems. To comprehensively evaluate their performance, the key testing instruments involved in the standard mainly include: a differential pressure gas permeation analyzer for assessing core gas barrier properties, an intelligent electronic tensile testing machine for testing mechanical properties, and precision analytical equipment such as transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS) for analyzing microscopic morphology and elemental distribution.