The present invention relates to an environmentally friendly high flame retardant sponge, and belongs to the technical field of sponge products. The environmentally friendly high flame retardant sponge consists of the following raw materials by weight: 80-120 parts of polyether polyol, 30-150 parts of toluene diisocyanate, 10-80 parts of diphenyl methane diisocyanate, 2-5 parts of silicone oil, 0.8-30 parts of a foaming agent, 0.2-2 parts of a first catalyst, 0.3-5 parts of a second catalyst and 30-110 parts of a flame retardant. The environmentally friendly high flame retardant sponge has the characteristics of good flame resistance, small smoke density and no smoke toxicity other, achieves environmental protection requirements, and can be widely used in the fields of packaging, household, electronics, electrical appliances, toys, bags, shoes, and clothing.