The surface metallized liquid crystalline polyarylate conductive fiber can meet the requirements of aviation harness cables for weight reduction，radiation resistance，chemical corrosion resistance and other characteristics.However，its surface chemical inertia hinder the pretreatment coarsening of metallized preparation.The coarsening effect of sodium hydroxide and "Sodium hydroxide-ammonia alcohol derivative" on polyarylate fiber was studied by SEM and FTIR，and then the appropriate coarsening process parameters were obtained.On this basis，nickel electroless plating was carried out and the surface morphology，composition and crystallization of the coating were characterized by SEM，EDS and XRD.The results show that when the temperature is 50 ℃，the polyarylate fiber has a good coarsening and etching effect after being treated with 40% NaOH and 20% ethanolamine derivative for 10 min.The surface structure of the nickel plated fiber is compact and flat，the whole fiber is evenly wrapped without cracking and peeling，and average unit length resistance of the fiber is 10.8 Ω/cm.