Survival period after recurrence of small cell lung cancer is about 0.5-1 year, which needs to be analyzed in combination with the number and location of recurrence, with individual differences. Small cell lung cancer itself has a high degree of malignancy, the speed of disease development, and is prone to recurrence and metastasis. However, the specific survival period after recurrence is not fixed, and it needs to be analyzed comprehensively according to the number and site of patients, etc. In general, most of the patients remain between 0.5-1 year. If small cell lung cancer is metastatic or recurrent in a single lesion, after timely detection and surgical resection, with postoperative radiotherapy, chemotherapy and other treatments, there is a chance to be cured, and the survival period can be prolonged; however, if it is multifocal, with a large size of tumor, and if the treatment is not timely, then the survival period will only be about half a year, or even shorter.