According to the requirements of information-communication operations and the characteristics in military-civilian integrated information-communication system, an effectiveness evaluation method of military- civilian integrated information and communication support is proposed based on improved fuzzy comprehensive evaluation. Firstly, the key factors to affect the effectiveness of civil-military integrated information and communication support is analyzed by the analytic hierarchy process (AHP), and an evaluation index system is constructed by the improved Delphi method. Secondly, the weight of every layer index is calculated by 1-9 scale method, and the consistency is checked. And, based on the direct evaluation of quantitative indicators, the qualitative indicators are quantified by using fuzzy mathematics theory, thus obtaining the effectiveness evaluation calculation model, and improving the objectivity of the quantification of qualitative indicators. Finally, the effectiveness of the evaluation method is verified by a practical example, and the countermeasures and suggestions for improving the military civilian integration information and communication support system are given. This provides important reference for the optimization and efficiency improvement of military civilian integration information and communication systems.