Cable sealing installation protection device used on connector

The utility model discloses a cable sealing installation protection device used on a connector, comprising a connecting nut, an unlocking button, a retaining sleeve and a clamping jaw, the unlocking button is provided with a threading cylinder, the outer side of the end part of the threading cylinder is sleeved with the clamping jaw, the retaining sleeve is cooperatively installed outside the clamping jaw, and the connecting nut is composed of a nut connecting part and a cylinder body connecting part. An inner threaded hole is formed in the nut connecting part, and a sealing ring is mounted inthe cylinder hole of the cylinder connecting part in a sealing manner; a plurality of wedge-shaped unlocking petals are arranged at the end of the threading cylinder, the clamping jaw is provided with a plurality of clamping cantilever petals, the wedge-shaped unlocking petals of the threading cylinder are in one-to-one correspondence with the clamping cantilever petals of the clamping jaw, and the end of the threading c