Abstract: To assess the operational effectiveness, operational suitability, system of systems suitability of weapons and equipment under actual operational conditions, and test their capabilities to carry out operational tasks, the concepts of operational effectiveness, operational suitability, system of systems suitability of tactical data link are analyzed in this paper. A evaluation index system is built and the methods of the bottom index calculation are given. The results can provide reference for the research on theory and method for data link equipment operational test.