The integration application of the data link system with the command and control system, sensors, and weapon platforms is the basis for the data link combat application function. The concept and scope of data link integration are analyzed, and the development of data link integration in technology and management of foreign army is introduced. A data link integration framework based on three levels of core, options, and adaptation is proposed, and based on that an integration design of weapon cooperative data link and command and control data link is proposed. Finally, the development ideas of data link integration are given.