The invention discloses an environment-friendly leveling agent for disperse dye and belongs to the technical field of application of textile assistants. The environment-friendly leveling agent for the disperse dye is prepared from, by weight, 0.01-0.02 part of dimethyl disulfide, 14-17 parts of octadecyl toluene sulfonate, 5-7 parts of 2-acrylamide-2-methylpropanesulfonic acid, 1-1.4 parts of sodium thiosulfate, 15-20 parts of fatty alcohol-polyoxyethylene ether and 90-120 parts of water. The prepared environment-friendly leveling agent for the disperse dye is low in price, convenient to use and high in ecological environment friendliness; good leveling performance and retarding performance are achieved, no decoloration performance is achieved, electrolyte resistance is good, and foamability is low; dyed fabric is pure and full, the hand feeling is good, and the environment-friendly leveling agent a novel environment-friendly leveling agent.