Digital Eagle multi-rotor UAV/drone adopts the plug-in arms designed to solve the difficult problem of drone maintenance in a simple and reliable way. In recent years, the tasks of large-scale activities such as security, mass incident handling, natural disasters, and emergency rescue undertaken by the public security police system have become more and more serious. Public security organs around the world have an urgent need for equipment that can perform tasks such as aerial investigation, surveillance, and shooting. Digital Eagle multi rotor drones can be widely used in air command of combat system, and perform tasks such as air surveillance, reconnaissance, forensics, aerial image acquisition and transmission, and cooperate with ground police force, technology and equipment. Multi rotor uav can perform various monitoring tasks, diverse reconnaissance means, better deployment of police force, diversified methods of obtaining evidence, and more detailed execution ability.