Lung cancer of 6 centimeters is not considered serious if there is no lymphatic or distal organ metastasis, but if it is accompanied by lymphatic or distal organ metastasis, the situation will be relatively serious. Lung cancer is mainly determined according to the patient’s stage, i.e. the size of tumor, lymphatic metastasis and metastasis of distal organs. According to TNM staging standard, lung cancer of 6 centimeters belongs to T3 stage. If there is no metastasis in lymphatic system and distal organs, the condition is not very serious and surgical resection can be considered, and the cure rate is still relatively large. If there are metastases in the lymphatic system and distal organs, then it belongs to the middle and late stages, and the situation is relatively serious, and palliative surgery, radiotherapy, chemotherapy and targeted therapy are mostly adopted to prolong the survival period, and it is difficult to realize a cure.