The invention discloses a Teflon composite material, an arc extinguishing nozzle, a preparation method of the arc extinguishing nozzle and a high-voltage circuit breaker. The Teflon composite material comprises, by weight, 7-15% of cobalt aluminate, 1-15% of boron nitride and the balance Teflon. The arc extinguishing nozzle is prepared from the Teflon composite material. The arc extinguishing nozzle is prepared from the Teflon composite material filled with inorganic filler cobalt aluminate and boron nitride. Through reasonable adjustment of a filling ratio, nozzle material thermal conductivity is obviously improved, material arc ablation resistance is improved and excellent mechanical properties are obtained. The arc extinguishing nozzle can improve breaker interruption performances so that high-voltage circuit breaker operation stability is improved.