The severity of lung tumor and whether it can be cured or not are closely related to the benignity and malignancy of lung tumor and the stage of tumor. Patients are suggested to seek medical treatment in time and undergo lung CT, MRI and pathological biopsy to confirm the nature and stage of lung tumor. If it is benign lung tumor, it is not very serious and can be cured; if it is malignant lung tumor, especially late stage malignant lung tumor, it is more serious and more difficult to be cured. 1, benign lung tumor: generally grows slowly and will only produce compression symptoms with the increase of tumor, no local tissue and organ invasion, no lymph node and distant metastasis, it can be cured after surgical resection and has a good prognosis. Malignant lung tumor: malignant lung tumor is more serious. After the symptoms of malignant lung tumor appear, they are usually irritating dry cough, blood in sputum or bloody sputum, chest pain, fever and shortness of breath. As the disease continues to progress, patients will also suffer from wasting, difficulty in breathing and organ failure, which will endanger their lives. Therefore, timely treatment should be carried out when malignant lung tumor is found so as not to miss the best time for treatment. If the patient has a good constitution, no other diseases, early stage of tumor and very timely and standardized treatment, there exists the possibility of cure. If the patients themselves suffer from some chronic diseases, and the tumor stage is very late, and the treatment is not timely and standardized, it is usually difficult to be cured. Therefore, people with high risk of lung tumor, such as long-term smokers and those who have tumor patients in their family, should have regular medical checkups and timely treatment after lung tumor discovery. Treatment mainly chooses the principle of combining comprehensive treatment and individualized treatment, and selects reasonable treatment plan according to patients’ physical condition, tumor staging, invasion range and whether there is metastasis or not. In addition to surgery, malignant lung tumor may also need chemotherapy, radiotherapy, targeted therapy and other means to control the continued development of the disease, improve the quality of life and prolong the survival time of patients.