Otitis media is a common problem in children, which may cause hearing loss and complications sometimes. This topic will review the definition, causes, types, clinical characteristics and treatments of each type of ear infections in children, by reading recently literatures. It is important to make an accurate diagnosis and choose a appropriate treatment of otitis media in children to avoid antibiotics abusing. Sometime some cases need operations, which are effective, especially in chronic suppurative otitis media and cholesteatoma, and we need further studying focuse on when do the operations and how to shoose them.