Small cell lung cancer metastatic liver cancer, bone cancer, belongs to stage IV small cell lung cancer, 5-year survival rate is less than 5%. Small cell lung cancer belongs to malignant tumors with higher degree of malignancy and tends to develop metastasis earlier with poorer prognosis. If liver and bone metastases have already appeared, it belongs to stage IV small cell lung cancer, and the 5-year survival rate is less than 5%. If the patient’s physique is relatively good and actively cooperates with doctor’s chemotherapy and radiotherapy, very few survival time may reach 5 years, and most of the patients’ survival time is around 1~2 years. If the physical condition is poor and the liver function has deteriorated, the survival time in this case will be significantly shortened, even only a few months. When small cell lung cancer has distant metastasis, it is necessary to go to the oncology department of the hospital in time, evaluate according to the physical condition, and actively treat the disease, as well as set up the confidence to overcome the disease.