The utility model discloses a cable socket abrasionproof decreases, dampproofing protection device, a serial communication port, including sealed chamber arrangement, be equipped with the first structure of cable crimping in the sealed chamber arrangement, sealed chamber arrangement's top is connected with top seal structure sealing, sealed chamber arrangement's bottom and bottom seal structure sealing connection, the top seal structure is withstood to the upper end of the first structure of cable crimping, the first structure lower extreme of cable crimping is equipped with the draw -in groove that is used for the conductor spacing, bottom seal structure's centre is equipped with the hole that can supply spiral copper armour to pass, bottom seal structure can make sealed chamber arrangement and spiral copper armour sealing connection's preceding cutting ferrule including locating between sealed chamber arrangement and the spiral copper armour. The utility model discloses a full metalseal structure adopts the mechanical seal principle, seals cable socket in the cavity, can not be damaged because of serious friction at the cable laying in -process, the leakproofness is high, and the cable socket that is protected can not be at advance water or make moist of cable termination.