In recent years, a series of breakthroughs have been achieved in industries such as communications by reconfigurable intelligent surface (RIS) technology, an emerging and transformative technology. However, the application value of this technology in the military field has not been fully recognized. In view of this, the basic principle and current application status of RIS technology were first reviewed and analyzed. On this basis, the application prospect of RIS technology in the military field was delved into from multiple dimensions, including land battlefield communication coverage, sea battlefield communication networking, remote weapon charging, multi-target precise positioning, and auxiliary anti-interference communication. Finally, the core technical challenges faced by the application of RIS technology in the military field were summarized and analyzed. The research results provide theoretical references for the in-depth integration of RIS technology into the modern military combat system.