The invention discloses a
near space balloon system safety release method. The method comprises an unfolding stage, an inflation stage and a let-fly stage. By adopting the method, the windward area of a
balloon is small in the inflation stage, an obvious wind-catching phenomenon is not caused, a set of hoists is adopted for multi-point constraint, the state of the
balloon is controlled, thus the balloon is fixed safely and reliably, the wind resistance ability is high, thus the whole release process of a balloon
system can be completely carried out in an
external field, and a shelter place or a large-area ground is not needed; a descent control device is adopted, so that the liftoff speed of a
nacelle and the relative speed between the
nacelle and the balloon are lowered and the balloon
system is lifted off safely; in the release process of the balloon, release can be performed only under the condition that
rope belts are at a straightened state between the balloon and the
nacelle, the balloon can be released without waiting for completely lifting off the ground, one person can complete
initiation of all
rope cutters in release operation, the operation is quick, and the response is timely and reliable; the release process is safe and smooth, and the method can be surely applied to releasing large-scale
near space balloon systems with the load being higher than 100 kg.