The invention belongs to the technical field of refractory materials, and mainly provides a preparation method of a low-carbon aluminum-carbon refractory material for use in continuous casting. Polyborosilazane is taken as an additive, so that the high-temperature strength, oxidation resistance and erosion resistance of the low-carbon aluminum-carbon refractory material are improved; phenolic resin is taken as a bonding agent, and the adding amount of the phenolic resin is 4-6 percent by weight based on the total weight of the raw materials of the low-carbon aluminum-carbon refractory material; polyborosilazane is added into phenolic resin, and the adding amount of polyborosilazane is 3-7 percent by mass of phenolic resin. By adopting the method, the high-temperature strength, oxidation resistance and slag erosion resistance of a continuous cast low-carbon refractory material can be improved remarkably.