Abstract:A retrospective analysis on one case of purulent perichondritis of auricle caused by Actinomyces was performed. Patient was admitted to a hospital due to acute swelling and pain in right auricle for 2 days, on the day of admission, patient underwent incision and drainage of auricle abscess, pus was performed bacterial culture. Pus culture result after 4 days was Actinomyces turicensis, actinomycosis of right auricle was diagnosed. Patient was given large dose of penicillin G intravenously drip, then oral administration of amoxicillin, treatment lasted three and a half months, auricular redness and swelling subsided, there was no deformation or residual scar, follow-up for 3 months after withdrawal of drugs showed no recurrence. It is suggested that the infection caused by Actinomyces turicensis should be diagnosed early, treated with antimicrobial agents of high dose and enough therapy course, timely incision and drainage during abscess formation can avoid scar, deformity and functional damage of external auricle caused by missed diagnosis and untimely treatment.