In view of the difficulty of traditional air defense means to effectively deal with the problem of unmanned aerial vehicle (UAV) swarm, the concept of anti-swarm of rotorcraft flight platform equipped with high-energy laser was proposed. Firstly, through the study of the combat characteristics of typical swarms, the possible application modes of UAV swarms were analyzed. Secondly, by analyzing the characteristics of the existing air defense interception system, the application method of the rotorcraft flight platform equipped with high-energy laser weapons to combat the swarm was introduced. Finally, the possible application scenarios, killing modes and strike processes of rotorcraft airborne high-energy laser weapons were analyzed and studied. The characteristics of the light speed attack, point and surface killing, and all-weather strike of the high-energy laser weapon equipped on the rotorcraft flight platform were extremely suitable for the application scenarios of the swarm attack, which could more efficiently intercept the incoming swarm and reliably ensure the safety of important facilities.