group of La Force 2.48 (1 - 6, SD 1.111). the day each patient return to work normaly: Group of Coblator: 1.31 ngày (1 - 3; SD 0.614), group of La Force: 1.76 ngày (1 - 4; SD 0.951); And Rates of omission VA tissue: Group of Coblator: 0%, group of La Force: 96.2%. Conclusion: Endoscopic transnasal adenoid ablation by coblation is a safe and effective method, with short surgery time, decrease in blood loss, have not omission VA tissue, less postoperative pain, faster healing and reduced home care.