The utility model belongs to a spacecraft sealing device specifically discloses a pollution -free gasbag separator gasbag end sealing device, and the device includes head, interior clamp, outer clamp, lid and connect, and airbag sleeve is on the head outside, and interior hoop sleeve is on the gasbag outer wall, and including the outer hoop sleeve outside the clamp afterbody, head afterbody nestification outside clamp and the outer clamp, connects the nestification in covering the front portion including the lid cover in outer clamp. Gas leakage of gasbag end and gasbag were damaged when this sealing device can effectively prevent to separate to there is good environmental suitability, improved the reliability of the vertical separation of space flight carrier.