1.Rapid development of modern warfare, since the Gulf War in 1990, to date, the information technology joined the communications field, and produce difital communication technologies, the development of tactical data link technology. 2.Through common operating picture, instant access to reconnaissance and make operational decisions, showing the war to the data link as the main means of information transmission network high efficiency and fast characteristics. 3.The future will go hi-tech, fast, wide information of the joint operational patterns. Combined with tactical data link to intelligence sharing, joint action, fighting force under the principle of integrating the concept of the development of C4ISR systems, to optimize their effectiveness, reach the purpose of joint operations.