The invention provides a refractory slurry powder for an air brick, which belongs to the field of refractory materials for the air brick. The refractory slurry powder comprises, by weight, 60 to 85 parts of quartz sand, 1 to 10 parts of graphite, 1 to 15 parts of a binder, 0.5 to 10 parts of a plasticizer, 1 to 5 parts of micro powder and a dispersant which accounts for 0.05 to 0.5% of the total weight of the quartz sand, the graphite, the binder, the plasticizer and the micro powder, wherein the binder is a composition of bentonite and soft clay, the plasticizer is methyl cellulose, or dextrin or a composition of methyl cellulose and dextrin, and the micro powder is active alpha-Al2O3 micro powder, or active SiO2 micro powder or a composition of the alpha-Al2O3 micro powder and active SiO2 micro powder. During usage of the refractory slurry powder provided by the invention, the problem of permeation of steel hardly occurs; and during replacement of the core of the air brick, the core can be easily pulled out, and residual fire clay of a brick cup can be easily cleared.