In order to meet the operator"s requirements of simulation training for the tethered multi-rotor UAV and its mission load operation, a tethered multi-rotor UAV consisting of a flight simulation computer system, a portable control terminal simulator, and an instructor console is designed. We propose a tethered multi-rotor UAV based on a rope and a simulation model of its aerodynamics, flight scene, scenario battlefield environment and scene objectives. The realization of the system is described from the aspects of system architecture optimization, the protocol of communication link, and replacement of real equipment.Keywords: Tethered multi-rotor UAV; Rotor aerodynamics;Simulation training system