The invention relates to a color forming method of batik indigo dye and relates to the technical field of batik processing. The method comprises the following steps: dissolving sodium thiosulfate, sorbitan fatty acid and potassium hydroxide into water, putting natural fiber fabric which is dyed with blue and dewaxed into the solution, soaking and drying; and putting the dried natural fiber fabricinto a solution prepared from casein, guar gum, acrylic acid and water, soaking and airing. The batik article prepared by the method has good hand feeling, takes good pigment color and can obviously prolong the storage life of the batik article.