Tartary buckwheat cocoa-fragrance noodles and a preparing method thereof are disclosed. The noodles are prepared from tartary buckwheat, cocoa powder, germinated brown rice, chamomile, wheat flour, root of kudzu vine, linden blossom, glossy privet fruit, common broom, cassia seeds, Chinese honey locust gum, xanthan, inulin, mulberry juice and a proper amount of water. The noodles prepared are richer in nutrition, capable of promoting body metabolism and absorption, durable, boilproof, pliable and tough, smooth, rich in fragrance, tasty and refreshing in taste, suitable for eating by various persons, and capable of increasing active functional components such as organic selenium and GABA, enhancing body oxidation resistance and benefiting body health. Through combining fresh milk fragrance of the brown rice and the tartary buckwheat, taste is rich. The common broom, the cassia seeds, and other traditional Chinese medicine functional components are added, and therefore healthcare value is improved. The overall recipe is synergistic and compatible. The noodles are rich in natural plant components, can improve body functions, have functions of nourishing yin, invigorating spleen, reducing the blood pressure and lowering lipids, and are beneficial to human body health.