Patients with middle and late stage lung cancer will have symptoms and signs such as malnutrition, hypoproteinemia, anemia, electrolyte disorder and decreased digestive function, so patients should eat more foods rich in high quality protein, such as chicken, fish, milk, eggs, quail eggs, etc. Patients should eat more foods with blood nourishing effect, such as red dates, black beans, black rice, gum, etc., and more fresh fruits and vegetables rich in vitamins and various electrolytes, etc. Patients should eat more foods with the effect of nourishing qi, such as barley kernel, sea cucumber, etc., and eat more soft and easily digestible porridge. In addition, most of the patients in the middle and late stage of lung cancer will have cough and phlegm, so they can eat more foods with the effect of resolving phlegm and clearing lung heat, such as licorice water, loquat, pear and honey. In conclusion, appropriate foods should be selected according to the symptoms and signs of patients with mid-to-late stage lung cancer.