It is not possible to generalize how many times chemotherapy and immunotherapy for squamous lung cancer are effective, and it is related to the patient’s sensitivity to the drugs and the patient’s own immune expression. Chemotherapy and immunotherapy are important treatments for patients with squamous lung cancer. Most squamous lung cancers are more sensitive to chemotherapy, so generally chemotherapy will be effective after 2 cycles, 1 cycle is generally 21 days, and patients’ squamous cancer tumors will shrink or stabilize without development. Patients with squamous lung cancer who have high immune expression can be treated with immune drugs alone, and generally patients who are sensitive to the drugs also take effect after about 2 cycles, 1 cycle is 14 or 21 days, and the effect can be assessed after 2 cycles of using immune drugs in general. If the immunity is low expression or non-expression, the immunity generally needs to be used in combination with chemotherapy. Generally, it takes longer time for the immunity drug to take effect, but since it is used in combination with chemotherapy, most of the patients will also have the therapeutic effect of tumor shrinkage or non-growth after 2 cycles.