The invention relates to a full-automatic assembling machine for a cable sealing connector. The full-automatic assembling machine comprises a rack and a power distribution control box. The rack is provided with a conveying groove. The conveying groove is matched with a feeding device. The rack is provided with a connector body feeding device, a connector feeding device, a locking device, a sealingcover feeding device, an overturning device, a sealing ring feeding device, a fixing ring feeding device, a discharging mechanical arm and a discharging groove, all of which are matched with the conveying groove. The overturning device comprises an overturning seat arranged on the rack. The overturning seat is provided with an overturning movable air cylinder, the overturning movable air cylinderis connected with an overturning lifting air cylinder, and the overturning lifting air cylinder is connected with an overturning motor. The overturning motor is connected with an overturning clampingdevice matched with a product on the conveying groove. The overturning movable air cylinder, the overturning lifting air cylinder, the overturning motor and the overturning clamping device are connected to the power distribution control box. By means of the full-automatic assembling machine, automatic assembling of parts at the upper end and the lower end of a connector body can be achieved, theassembling efficiency is greatly improved, and meanwhile errors caused by human factors are avoided.