The invention relates to a processing method of wheat germ steamed buns. The making method comprises the following steps of step 1, making mixed lactobacillus powder; step 2, making a mixed lactobacillus solution; step 3, performing kneading to obtain sour dough; step 4, performing fermentation; and step 5, making the steamed buns. According to the scheme of the making method disclosed by the invention, various bacteria species of lactobacillus bulgaricus, streptococcus thermophilus, lactobacillus acidophilus, lactobacillus plantarum, bifidobacteria, lactobacillus rhamnosus and the like are adopted to perform mixed fermentation to make the sour dough; the bacterial strains are coordinated for fermentation, so that the flavor of the steamed bus can be improved, the effects of resisting bacteria and prolonging the quality guarantee period are achieved, and the steamed buns have good anti-aging product; the wheat germ steamed buns obtained by the making method disclosed by the invention are high in nutrient value, and contain rich vitamin E, vitamin B1 and protein; and wheat germs also contain various minerals and various trace elements of calcium, potassium, magnesium, ferrum, zinc,chromium, selenium, phosphorus, manganese, copper and the like.