Radiotherapy for small cell tumor is more effective, and it can play a better therapeutic effect for early small cell tumor. Small cell tumor, with higher malignancy and shorter survival period, small cell tumor is mainly treated with chemotherapy, which needs to be combined with surgery or radiotherapy and other comprehensive treatment modes. For small cell tumor, the earlier the better the radiotherapy, the hospital will usually carry out cycle chemotherapy first, and then synchronous radiotherapy. In case of advanced and extensive stage, radiotherapy can reduce local symptoms and combine with chemotherapy at the same time. Therefore, it is recommended that patients with small cell tumors should seek medical treatment in time and under the guidance of doctors. Meanwhile, they should follow the doctor’s instructions before using the drugs, and should not stop or use the drugs privately.