Abstract: Aimed to enhance the accuracy of Web services discovery in unstructured peer-to-peer networks. A semantic-based Web services matching method was proposed in this paper. Firstly, we designed a service content model for peer-to-peer nodes based on the functional properties. Then, we proposed a use case of computing service, and established a semantic dictionary for it. Finally, object to the service content, we designed a node structure for distributed service publishing and discovery architecture, and the matching algrithm. The analysis result of the computing case showed that the matching degree value had a reasoning distributed property in its domain, and, the matching algrithm meeted the need of the computing service.