The invention relates to a flywheel energy storage propelling device. The flywheel energy storage propelling device comprises a motor unit, a transmission device, a flywheel energy storing system, an energy releasing device, a guide rope, a pulley block, a tackle and a tackle rail. The flywheel energy storage propelling deice is suitable for ejecting and propelling objects of different mass classes, such as unmanned aerial vehicles, warplanes, early warning airplanes, rockets, guided missiles and the like according to a reserved parameter change curve. The ejection process is controllable, and the changing processes of acceleration, speed, sliding distance and the like can be optimized according to needs and the mass magnitude of the airplanes, the guided missiles or the rockets.