The invention relates to the field of
aerospace, and particularly discloses a
spacecraft ejection launching
system. By arranging the launching track, the three sealing valves, the
vacuum pump, the ultra-fast sealing valve and the
catapult vehicle, an operator can place a
rocket on the
catapult vehicle, the
catapult vehicle transports the
rocket into the double-sealing door section, the
vacuum pump is operated to enable the interior of the double-sealing door section to be vacuum, and the second sealing valve is opened; the driving module drives the catapult vehicle and the
rocket to accelerate in the
linear acceleration track section, the launching angle is adjusted through the turning track section, then the catapult vehicle and the rocket are separated in the separation track section, the rocket enters the
free flight track section to do
free flight motion due to
inertia, and the ultra-fast sealing valve is controlled to be fast opened and closed. The high vacuum degree in the launching track is maintained, it is guaranteed that the rocket can conduct vacuum flight in the launching track, the rocket has the
flight speed large enough, the rocket launching quality is reduced, and meanwhile the
carrying capacity of the rocket is improved.