Methods: Crossectional study with 100 patients with plasma knife tonsillectomy and 36 patients with classic tonsillectomy. Result: The Plasma group had an average surgical time shortened by nearly 7 minutes (reduced by 31.6%), the median blood loss was 5ml in the plasma knife surgery group, nearly 5 times less than the classic tonsillectomy, recorded 0/100 patients in the tonsillectomy group bleeding within 24 hours, compared with 4/36 patients with classic tonsillectomy with the difference in the two groups was statistically significant (p<0.001).