Most of the survival period of advanced squamous lung cancer with maintenance treatment is between 3-12 months, which needs to be determined by combining the treatment effect, physical condition and so on. Patients with advanced squamous lung cancer have lost the chance of surgery, and most of them are treated with radiotherapy, chemotherapy as well as immunotherapy, targeted therapy, etc. Different patients have different treatment sensitivity and physical conditions, so there will be differences in survival period, which is generally kept between 3-12 months. If the patient is sensitive to radiotherapy, chemotherapy, etc., or targeted drugs, the survival period can reach 1 year, or even longer; however, if the patient has already developed intracranial and liver metastases, and the treatment effect is not outstanding, it may only be about 3 months.