To expand identification efficiency under complex battlefield environment, a new method of identifying friend or foe (IFF) information distribution based on network is proposed in this paper. The characteristics of IFF network such as isomerous autonomy and dynamic temporary are analyzed and the ability of link backup and node backup which affect the destroy resistant feature during information distribution are also investigated. Further more, the validity of the method is described from three aspects of integrity, preciseness and real time. The conclusion states that this method has positive action on the enhancement of identification efficiency.