This study was a multicenter, open-label, randomized controlled clinical trial. A set of unified standards were used, including the clinical research program, inclusion criteria, exclusion criteria, chemoradiotherapy regimen and evaluation criteria. Six medical centers participated in this study and 120 patients with pathologically confirmed locally advanced low-risk nasopharyngeal carcinoma were enrolled. These patients were stratified according to clinical stage and participating center, and were randomly divided into two groups: IMRT combined with Endostar group ( IMRT 70-74Gy, Endostar 7.5mg / m2, 2 cycles of intravenous infusion, and 2 cycles of maintenance therapy after radiotherapy) and IMRT combined with concurrent chemotherapy group ( IMRT 70-74Gy, DDP 100mg / m2, intravenous infusion over 2 hours , for 2-3 cycles). After treatment, follow-up was performed every 3 months. The treatment toxicity, local control rate, distant metastasis-free survival, overall survival, progression-free survival were observed and assessed.