A method of producing milo starch which comprises the steps of immersing refined milo in a weakly acidic solution of sodium chlorite to remove the tannin, grinding the same to provide a starch slurry, and removing the proteins from the latter. The method is capable of producing milo starch of high purity at low cost without causing odor pollution. A method of producing milo starch includes, besides the steps described above, the steps of lactic-fermenting the waste liquid resulting from the immersion of white grain milo, concentrating the liquid, mixing the concentrated liquid with the bran resulting from the refining of milo, and drying the mixture to provide milo feed. By this method, it is possible to produce milo starch without having to provide any special equipment for treating the waste water.
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