The invention discloses vermicelli suitable for people with metabolic syndrome, and a preparation method of the vermicelli, belonging to the field of food processing. The vermicelli is prepared by taking barley flour fermented by using lactobacillus plantarum, and wheat flour as raw materials, wherein edible salt, edible sodium carbonate and vital gluten are added into the raw materials; the preparation method comprises the processes of kneading dough, carrying out curing calendering, carrying out secondary curing calendering, cutting into strips, drying in the air, packaging, and the like. The vermicelli is prepared by taking barley, which has rich nutritional value and prominent health care functions, as one raw material, and the barley is dried into powder after being fermented by using the lactobacillus plantarum, so that the biological transformation of nutrient substances is realized, and the vermicelli can help the people with the metabolic syndrome to lose weight and relieve the glucose and lipid metabolism disorder of the people with the metabolic syndrome after being eaten for a long time. The vermicelli realizes the complementary advantages of the barley flour fermented by using the lactobacillus plantarum, and the wheat flour, so that the barley flour fermented by using the lactobacillus plantarum supplements partial nutrients such as beta-glucan, phenolic compounds and mineral substances which are lacked by the wheat flour on the one hand, and rich gluten and excellent processing performance of the wheat flour make up the defect that the barley flour fermented by using the lactobacillus plantarum cannot easily form a gluten structure on the other hand. Furthermore, in the process of fermenting the barley flour by using the lactobacillus plantarum, functional polypeptide is formed by means of proteolysis, so that a contribution is made to the use of the vermicelli.