International Classification of Diseases (ICD) is a system by which the World Health Organization (WHO) organizes disease information in alphabetical and numerical codes according to disease characteristics and specific classification rules. ICD has constructed an internationally unified standard for disease classification and constituted the basis of global medical health data, which promotes the sharing and application of global medical information. It has been continuously improved and upgraded according to application needs, and has been widely used in the world. ICD has also been widely used in the military field. For example, the U.S. military has integrated ICD into its health service support system, which has played a fundamental and active role in improving the treatment of combat injuries and optimizing health service decision-making. With an advanced basic model system and a relatively complete content system, ICD-11, the latest version of ICD, has certain advantages for military application. Therefore, to provide strong support for the future health service for warfare, we should learn from the experience of foreign military ICD application based on the existing achievements, construct advanced information classification system for combat injury classification, and improve its advancedness and scientificity.