The mini-soldier digital image transmission system is composed of a Mini-transmitter and a receiver. The Mini-transmitter is small in size and light in weight. It can be installed in a hidden part of the body, or in a portable handbag or briefcase to transmit the image in real time. The system adopts advanced COFDM communication technology and MPEG digital image compression coding technology, and real-time audio and video transmission to mobile command vehicle or command center in high-speed mobile environment and in dense buildings such as cities. The system is widely used in public security fire department, and plays a great role in emergency command and handling emergencies.