The survival time of patients with small cell carcinoma is relatively short, about 1-2 years, depending on the disease stage and treatment. Small cell carcinoma is one of the malignant tumors in lung, with higher malignancy, faster development, earlier metastasis, and poorer effect of surgical treatment, which has a greater impact on patients’ life expectancy, and the survival period is usually about 1-2 years. Patients with this disease are found early, in the early stage when discovered, the tumor is relatively limited, no metastasis has occurred yet, the survival time of patients after radiotherapy is relatively long, about 1.5-2 years. If the tumor is already in the middle or late stage when discovered, the survival time is shorter even after treatment, about 1 year. During the treatment period, patients need to pay attention to maintain a good mental state, scientifically match their diet and improve their immunity, thus helping to prolong their life.