In order to improve China's emergency rescue capability for disasters and accidents, drawing on the concept of military operations, a digital battlefield system for emergency rescue was built. The "sky, air and ground integrated emergency communication support system" and "information, direction and action integrated emergency command and operation system" were established by combining the practical application capability of key technologies such as emergency rescue tactical Internet building, on-site digital holographic perception, situation evolution and intelligent auxiliary decision-making, visual command and cooperative action. It was verified through the actual combat effectiveness in the emergency mission exercise, and solved the practical combat problems in the on-site emergency rescue work of complex disasters, such as difficult communication support, difficult information decision-making, difficult situation research and judgment, difficult command and scheduling, and difficult combat coordination, so as to achieve scientific, efficient, and accurate rescue. The results show that the construction of an emergency rescue digital battlefield system creates a new emergency rescue mode of individual digitalization, battlefield networking, command visualization, and rescue intelligence. A series of technical equipment and system platforms are put into practical application. It can help improve China's disaster and accident rescue communication support, on-site perception, auxiliary decision-making, and command scheduling capabilities.