Patients with small cell lung cancer who live beyond three years also exist. The 5-year survival rate of small cell lung cancer is around 30%, and the specific survival time needs to be analyzed according to the patient’s clinical stage, physical condition and treatment. Small cell lung cancer is a highly malignant type of cancer, the growth, spread and metastasis of cancer cells are very fast, usually when it is found it is not in early stage and cannot be treated by surgery, the main treatment is radiotherapy or chemotherapy. The main treatment is radiotherapy or chemotherapy. If the growth of tumor is controlled in time through active radiotherapy or chemotherapy, the life span can be prolonged. Therefore, when uncomfortable symptoms occur in the body, one should go to the hospital for examination in time, and detect it at an early stage. In case the cancer cells have not metastasized, the probability that the survival period will reach more than five years after active surgical treatment will be increased accordingly. Patients with small cell lung cancer may suffer from loss of appetite, dyspepsia, gastrointestinal hypermotility, etc. In daily life, they should avoid eating fried, raw and cold food, barbecue, etc. After diagnosed with small cell lung cancer, they should actively cooperate with the treatment to improve the survival rate.