This article reports a case of a child with middle ear cholesterol granulomas caused by hearing aid impressions. A 3-year-old female patient presented to the doctor because of "repeated pus discharge from the left ear for half a year". Otoscopy revealed granulation tissue in the external auditory canal. CT of the mastoid of the temporal bone showed mass in the middle ear. Under general anesthesia, the external auditory canal tumor was removed + complete wall mastectomy. In the process of opening and tympanoplasty, the middle ear mass was found to be a hearing aid impression during the operation, and the postoperative pathological suggestion was: cholesterol granuloma. The child was discharged from the hospital 1 week after the operation, and recovered well after the operation. There was no recurrence during the 1-year follow-up.