The invention provides a health-care food for adjuvant therapy of hypothyroidism and a preparation method thereof. The formula comprises 15-25% of dried ginger, 1-5% of ginseng, 5-15% of prepared common monkshood daughter root, 5-15% of Chinese angelica, 9-20% of Indian buead, 10-25% of common macrocarpium fruit, 5-15% of south dodder seed and 10-25% of barbary wolfberry fruit, the preparation method comprises the following steps: removing impurities, cleaning, drying, grinding, sieving and uniformly mixing; and the health-care food can be prepared into formulations comprising capsules, tea bags, tablets, pills, syrup and decoction pieces. The health-care food can be used for the adjuvant therapy of the hypothyroidism and also has multiple effects of restoring yang, promoting blood circulation, stagnating qi in skin, dredging joints in four limbs, opening internal organs, opening heart, benefiting intelligence, promoting blood circulation, breaking stubborn masses, removing pathogenic qi, generating muscles, treating inward invasion of pathogenic cold, edema and tumescence and the like; and furthermore, the health-care food can be used for effectively enhancing the immunity of a human body, and has a great therapeutic effect for diabetes and high sugar in bloody urine.