The handheld ad hoc network device is a portable communication device that does not rely on fixed infrastructure. It is small in size and light in weight, equipped with a detachable lithium battery. It can be held in hand or carried on the shoulder or back of a soldier. It features dynamic networking, multi-hop transmission and anti-interference capabilities. It can provide voice group call, video return transmission, relay transmission and other multimedia communication services for individual soldiers, tactical teams and tactical police dogs, achieving high-speed coordination.