Aiming at the ‘Black Fly’ problem of UAV (unmanned aerial vehicle), a program of the anti-UAV tethered-net capture system consisting of platform flying, flexible tethered-net arresting and parachute recycling was proposed, and a dynamic model of the whole process was conducted. The platform flight trajectory model and the tethered-net dynamic model were compared and verified with the test data. The results show that the proposed system dynamics modeling and simulation program is feasible and has guiding significance for engineering system design.