The invention provides a preparation method of a nozzle graphene refractory material, and the preparation method comprises the following steps: (1) firstly preparing a heat conducting layer, namely, mixing graphite powder, graphene powder and a binder, and uniformly coating the working surface of a long nozzle or a submerged nozzle with the mixture; (2) preparing a ceramic membrane protective layer, namely, evenly mixing Al2O3, SiN4, TiC, WC, a binder, a lubricant, a dispersant and water, and coating a heat conducting layer prepared in the step (1) with the mixture; (3) performing low-temperature calcination; (4) performing high temperature calcination. According to the invention, the high thermal conductivity of the graphite and the graphene is utilized to rapidly disperse the thermal shock of molten steel to the whole long nozzle or submerged nozzle body, so that the heat accumulation in a local area of the nozzle is avoided, and each part of the nozzle can maintain the stability andfirmness of the internal structure without the appearance of weak areas, and the working time of the nozzle as a whole is improved.