Lung cancer progresses rapidly and has a poor prognosis, and there is a lack of effective secondary prevention measures. For example, strengthening effective ventilation in the living room, adopting air purification devices, choosing environmentally friendly interior decoration materials, choosing appropriate oils and using hoods when cooking to prevent inhalation of harmful gases, etc.; 3. Strengthening occupational protection work to prevent occupational lung cancer and regular medical checkups; 4. Dietary prevention and chemoprevention, aiming to prevent lung cancer occurrence and differentiation by using drugs, food or nutrients to intervene in precancerous lesions Reversing tumor cells to prevent and control lung cancer. Studies have confirmed the role of a variety of foods in lung cancer prevention.