Abstract: The cooperative control strategy of unmanned cluster is a key technical problem affecting the efficiency of its military applications. Firstly, five main types of UAV cluster cooperative control strategies are systematically expounded: "leader-follower" model, virtual structure control strategy, behavior-based control strategy, artificial potential field and artificial intelligence-based control strategy. The advantages and disadvantages of each are compared and analyzed. Then, three typical military application scenarios of coordinated reconnaissance, coordinated strike and coordinated rescue are studied. The military needs, implementation strategies and main challenges of each application scenario are analyzed. Finally, the predictions and analysis of the future development trend of military applications of unmanned cluster are given.