The invention relates to the technical field of epoxy resin coatings, in particular to a high-efficient flame-retardant epoxy resin coating. The high-efficient flame-retardant epoxy resin coating is prepared from the following raw materials in parts by weight: 30-40 parts of epoxy resin, 20-30 parts of polyurethane modified epoxy resin, 10-15 parts of a curing agent, 5-10 parts of surface migration fire retardant containing nitrogen and phosphorus, 15-20 parts of filler, and the balance of a solvent. The formula of the high-efficient flame-retardant epoxy resin coating provided by the invention is reasonable; the surface migration fire retardant containing the nitrogen and the phosphorus is added to a coating system; on one hand, the fire retardant has strong surface migration, and a membrane with high fire retardance can be formed on the surface of a base material; on the other hand, when the content of the fire retardant reaches 5-10 percent, a cured product can reach a UL94 and V-0 level, the fire retardant effect is good, and wide promotion is facilitated.