The utility model discloses a radioresistance pyrocondensation fire -retardant power cable connect, a serial communication port, include: cable core, stress tube, fire -retardant layer, protective layer and cable semi -conductive layer, the outside parcel of cable core has stress tube, stress tube's inner wall and outer wall department are equipped with fire -retardant layer, fire -retardant layer is the flame retardant rubber layer, the fire -retardant layer surface of stress tube outer wall is equipped with the protective layer, the protective layer scribbles the protecting pipe of flame retardant paint for the surface, be equipped with the cable semi -conductive layer between the fire -retardant layer of stress tube inner wall and the stress tube. In this way, the utility model discloses radioresistance pyrocondensation fire -retardant power cable connect, simple structure has fine physics and electrical property, and the fire -retardant layer of inside and outside bilayer has stronger anti radiation effect, can keep long -term, safety under rugged environment, the steady operation, long service life, stability is high.