〔Abstract〕 Objective To explore the application value of 70 ° nasal endoscope in oral adenoidectomy. Methods 100 children with adenoid hypertrophy treated in Dongguan Chashan hospital from October 2017 to October 2018 were randomly divided into two groups, 50 in the control group and 50 in the observation group. The control group was treated with traditional adenoidectomy, and the observation group was treated with adenoidectomy under direct oral vision through 70 ° nasal endoscope. The treatment effect, operation time, intraoperative bleeding, length of hospital stay and incidence of complications were compared between the two groups. Results The total effective rate of the observation group was higher than that of the control group, and the length of operation, the amount of intraoperative bleeding, the length of hospitalization and the incidence of complications were lower than those of the control group (P < 0.05). Conclusion 70 ° nasal endoscopic adenoidectomy under direct oral vision is effective in the treatment of children with adenoidal hypertrophy. It can effectively shorten the operation and hospital stay, reduce the amount of bleeding, improve the clinical symptoms and reduce the incidence of complications.