Parkinson’s disease is mostly seen in the elderly, combined with plant nerve dysfunction, digestive function is mostly reduced gastrointestinal motility weakness, spasm, easy to constipation and excessive skin oil secretion, etc.. We should take into account the patient’s condition, dietary preferences, and pay attention to the structure of food ratios, side dishes, meat and vegetables, and the combination of fancy varieties. Eat more fiber-rich and easily digestible foods, eat more fresh vegetables and fruits, drink more water, eat more foods containing tyramine such as melon seeds, almonds, sesame seeds, skim milk, etc. to promote the synthesis of dopamine in the brain, and control the intake of fat appropriately. The protein diet should not be excessive. Blindly giving too much protein diet can reduce the efficacy of levodopa because the large amount of neutral amino acids produced in protein digestion can compete with levodopa to enter the brain and affect its efficacy. Therefore, the daily requirement of protein is 0.8-1.2g/kg body weight, and the appropriate amount of eggs, milk, fish and meat should be given in the diet. In case of fever and bed sores, protein supply should be increased. For people with mastication and swallowing dysfunction, it is appropriate to sit down when eating, and choose foods that are easy to chew, easy to swallow, high in nutrition and high in fiber. Recall the swallowing steps before eating. Let them swallow the excess saliva in the mouth when eating, move the food around with the tongue when chewing, eat little at a time and eat slowly, drink water after eating and swallow the residual food to prevent aspiration pneumonia. For patients with diabetes, a diabetic diet should be given; for patients with coronary heart disease and hypertension, a diet high in sugar and vitamins and moderate in protein is appropriate, and the intake of animal fat and salt should be restricted.