The results showed that the VMAT dose-modulated radiotherapy technique had advantages over the 3D radiotherapy technique in the treatment plan as shown by the indexes of HI, CI, UI, V95 at PTV; V105, volume of organs receiving radiation dose; partial response rate accounted for 80%; The overall 24-month survival rate was 64%, and the rates of early and late complications including pneumonia and esophagitis were low and only at level 1 or 2.