Intrapulmonary metastasis of squamous lung cancer is one of the most common ways of metastasis of squamous lung cancer, which may be related to smoking, heredity, environment and other factors. Lung squamous carcinoma, or squamous cell carcinoma of the lung, is a type of small cell lung cancer. Its etiology is not clear, and may be related to smoking, heredity and environment. The main metastatic modes are peripheral metastasis and lymph node metastasis, and distant metastasis rarely occurs. Peripheral metastasis includes intrapulmonary metastasis. They usually occur in the left lung and can also invade the pleura, causing chest pain. If it invades nerves, it can directly cause neuralgia, and if it invades blood vessels, it can encircle blood vessels and cause distant metastasis. The prognosis of squamous lung cancer is poor. It is mainly relieved by surgery, radiotherapy and chemotherapy to prolong life. Once diagnosed, please improve the examination in time and cooperate with doctors for the best prognosis.