Dietary contraindications in ankylosing spondylitis are related to the presence or absence of vital organ involvement. Patients with renal insufficiency need to reduce salt intake; patients with cardiac insufficiency need to refrain from eating high-calorie foods and cholesterol-rich foods; and patients with ankylosing spondylitis without vital organ involvement need to avoid high-sugar diets and spicy foods. Patients with ankylosing spondylitis without vital organ involvement should eat a well-balanced diet rich in vitamins and proteins, avoid high-sugar diets and spicy foods, and relatively reduce the intake of carbohydrates, such as rice, noodles and sugar. Ankylosing spondylitis patients with renal insufficiency need to have a low-salt diet, with less food preserved in sauces, salt, soy sauce and other condiments, and limit the amount of water consumed per day according to the specific needs of the disease. Patients with cardiac insufficiency should not eat high-calorie foods, such as chocolate, sweets, fried foods, etc., and should not eat high cholesterol foods, such as animal offal. Patients diagnosed with ankylosing spondylitis are advised to go to the rheumatology and immunology department of a regular hospital for treatment and care under the guidance of a doctor.