Abstract: Medical Examination and Management Principle for the Overexposed Individuals has been approved and issued by the Ministry of Health. Based on the extensive research of literature, collection of the previous nuclear and radiation accidents excessive exposed personnel data and specific situations in China, this standard was enacted according to the current national laws, regulations, and the opinions of peer experts. The standard specifies the scope of application, necessary projects of medical examination and treatment principle of excessive exposure(< 1.0 Gy) personnel. It is mainly used in nuclear and radiation by accident as personnel medical examination, treatment principle and the late effects of the medical follow-up principle. To correctly implement this standard and guide medical examination and treatment of excessively exposed personnel, the contents of this standard were interpreted in this article.