The invention relates to a noodle capable of reducing blood sugar and a preparation method thereof. The noodle is composed of the following components in parts by weight: 2 to 6 parts of pumpkin powder, 3 to 5 parts of sorghum, 4 to 7 parts of buckwheat, 3 to 6 parts of wheat bran, and 72 to 85 parts of wheat flour. The noodle is prepared from pumpkin powder, sorghum, buckwheat, wheat bran, and wheat flour according to a fixed ratio; the pumpkin powder, sorghum, buckwheat, and wheat bran are natural foods, no additive is added, and the effective components and functions of pumpkin powder, sorghum, buckwheat, and wheat bran are fully utilized and combined with wheat flour to prepare the healthcare noodle, which has the advantages of reasonable and balanced nutrients, low sugar content, low cost, simple production technology, and smooth, fine, and delicious taste, and also has the functions of improving digestion, retarding the absorption of sugar in intestines, regulating the blood pressure of diabetes patients, promoting the insulin secretion of diabetes patients, and adjusting the blood sugar of diabetes patients. Moreover, the noodle will not break and the soup will not turn turbid even if the noodle has been cooked for a long time.