This paper presented and described a P2P audio file sharing system which provided the content and similarly searching. It used a distributed hash table ( DHT) based overlay network to ensure the scalability and avoid network-wide message flooding. By using rendezvous points, achieved the music metadata registration and query. It described each file in the system by a music file description( MFD) which essentially was a set of attribute-value (AV) pairs and thus flexible searched semantics based on attribute-value pairs and automatic extraction of musical features and content-based similarity retrieval could also be accomplished. Also discussed the software architecture on a peer node subsequently. Hie analysis results show that the approach can maintain a high throughput and high query success rate.%提出了一个基于内容及相似搜索的对等音乐文件共享系统.该系统建立在结构化的应用层覆盖网络之上,保证了系统的可扩展性和避免了网络消息的洪泛；利用了集合对等点来完成音乐文件的元数据的注册和搜索；把音乐文件的属性名一属性值对(attribute-value pairs,AV-Pairs)通过MFD( music file description)来表示,使系统既可以支持精确的检索,也可以完成复杂的语义相似性搜索,特别是基于内容的搜索和下载；描述了对等实体上的软件功能模块,构建了一个实际的对等音乐文件共享系统.测试结果表明,随着大量搜索请求的到达,系统保持了比较高的吞吐量,同时具有比较高的成功搜索率.
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