The invention discloses an ecological dye used for children articles, which comprises a coloring agent, banana juice, a dye leveler, a dispersant, a thickening agent and deionized water; the coloring agent is prepared by cobalt oxide and neutral pink according to mass ratio of 1: 3, the coloring agent accounts for 30-40% of total mass percentage, banana juice accounts for10-15% of total mass percentage, the levelling agent accounts for10-15% of total mass percentage, the dispersant accounts for10-15% of total mass percentage, acetate acid gracial accounts for10-15% of total mass percentage, the thickening agent accounts for10-15% of total mass percentage, and is the modified starch with DE value of more than 55%, and the balance is deionized water. Compared with the prior art, the dye of the invention has the advantages of excellent formula, good effect, no toxicity and health.