The invention relates to a novel refractory coating capable of preventing powder from falling. The novel refractory coating is characterized by comprising the following components in mass ratio: 10 to 15 parts of epoxy resin, 0.5 to 0.9 part of antibacterial agent, 1 to 4 parts of mildew preventive, 10 to 25 parts of modified sericite, 10 to 20 parts of water, 5 to 10 parts of titanium dioxide, 9 to 15 parts of alumina powder, 1 to 2 parts of flexibilizer, 1 to 3 parts of flatting agent, 10 to 15 parts of chrome yellow, 10 to 15 parts of falling preventing agent, 5 to 10 parts of nickel iron chromite black spinel, 3 to 5 parts of coupling agent, 2 to 4 parts of expanded perlite, 1 to 2 parts of coalescing agent, 8 to 12 parts of quartz powder, 15 to 25 parts of melamine, 20 to 30 parts of aluminium silicate, 8 to 15 parts of monox, 1 to 3 parts of barium sulfate, 1 to 3 parts of antifoaming agent, 1 to 3 parts of wetting agent, 20 to 30 parts of mixed solvent, 5 to 10 parts of zinc oxide, 10 to 20 parts of zinc phosphate, 15 to 25 parts of aluminium triphosphate, 5 to 10 parts of sodium hydroxide, and 1 to 8 parts of hydrochloric acid.