Lung squamous carcinoma belongs to malignant epithelial tumors of bronchial origin, which usually grows slowly and metastasizes late, and has a higher chance of early surgical treatment and longer survival period. Lung squamous carcinoma is closely related to smoking and mainly occurs in segmental bronchus, which may cause bronchial stenosis in early stage. The main clinical manifestations of lung squamous carcinoma are coughing, coughing up sputum, blood in sputum, shortness of breath or wheezing, chest pain, fever, and emaciation. Early stage of squamous lung cancer can be cured by surgical treatment, but for patients with lymph node metastasis and distant metastasis, radiation therapy can be carried out, and chemotherapy can also be taken for patients with poor tolerance. People with smoking history should be alerted when symptoms such as coughing, sputum and hemoptysis occur, and early diagnosis and treatment should be carried out.