Calcium deficiency after thyroid surgery is often due to hypoparathyroidism caused by accidental injury to the parathyroid glands. Treatment is based on drug therapy. Patients with postoperative low calcium resulting in convulsions should be injected with calcium gluconate intravenously immediately; those with mild symptoms can take calcium gluconate orally and chewable calcium Vitamin D tablets; those with chronically low blood calcium can also take osteotriol. In addition to the above treatment, patients should sunbathe more, which can promote the conversion of vitamin D into active vitamin D and promote the absorption of calcium. It is also necessary to eat more calcium-rich foods in moderation, including dairy products, soy products, eggs, shrimp, nuts and so on. Calcium deficiency after thyroid surgery should be timely to the hospital, under the guidance of the doctor’s treatment.