Abstract: National occupational health standards—Diagnostic Criteria for Radiation Heart Injury has been approued and issued by Ministry of Health. On the basis of the extensive research literature, systematic study of the relevant laws and regulations in the criterias, further explicitly formulating the basis and principles of this criteria to guide the development of criteria. This criteria is mainly used for diagnosis of heart injury caused by radiation accident and medical radiation. To be better for using this criteria and to diagnosis correctly this disease and prompt treatment, the criteria-related content is interpreted in this article.