Acute otitis media 1.Acute non-suppurative otitis media; 2.Acute suppurative otitis media; 3.Acute necrotizing otitis media; 4.Acute mastoiditis. Chronic otitis media 1, chronic non-suppurative otitis media; 2, chronic suppurative otitis media (including mastoiditis). Cholesteatoma otitis media (excluding congenital middle ear cholesteatoma) 1. Acquired primary cholesteatoma; 2. Acquired secondary cholesteatoma. IV. otitis media sequelae 1. tympanic membrane perforation; 2. adhesive otitis media; 3. tympanic chamber sclerosis. Surgical methods for otitis media typology I. Tympanoplasty Type I: ① Type I a: tympanoplasty: patch test air conduction (hearing level) raised to 30 dB or less, or hearing loss below 30 dB, CT examination suggesting that the auditory chain is intact, intraoperative exploration of the tympanic chamber and the auditory chain is not required; ② Type I b: the tympanic chamber and the auditory chain must be explored, all 3 auditory tuberosities are present, the lever is intact, forming the tympanic membrane and the hamate bone connection. Type II: necrosis of the hammer bone stem, graft attached to the anvil bone or hammer bone head, forming a new tympanic membrane. Type III: ① Type IIIa: supra-stirrup structures are present, the stirrup sole is mobile, and the tympanic membrane is connected to the stirrup head or a raised structure on the stirrup head; ② Type IIIb: no supra-stirrup structures, the stirrup sole is mobile, and the tympanic membrane is connected to the sole with a reconstructed auditory tuberosity. Type Ⅳ: stirrup base plate is fixed, regardless of the presence of supra-stirrup structures; if the tympanic membrane is intact, a bottom plate opening is performed to reconstruct the sound transmission system; if the tympanic membrane is perforated, the tympanic membrane needs to be repaired after the second stage surgery. 2. Excision of mastoid lesions 1. radical mastoid surgery; 2. modified radical mastoid surgery; 3. simple mastoid chiselotomy.