Compressed air has many advantages as a clean and controllable launch medium. A multi-tube launch system using compressed air as a launch power source is constructed, and its design method is briefly described. The system can be used for the “black flight”UAV’s hard damage arresting of key targets and places in the urban environment. The basic parameters of the launch system using compressed air as the launch medium, such as the system pressure, volume, and the velocity of the damage source in the future, are determined by simulation and calculation. On this basis, the hit probability of the launch system arresting civil class rotor UAV is simulated and calculated. The results show that the system can be used for reference in the construction of gun-free launching system for arresting rotor UAV.