Traditional techniques EAI (Enterprise Application Integration) was difficult to meet the requirement of fast and effective integration of resources, collaboration or construction of business process. To deal with this problem, a mechanism of multi participant project management system based on SOA was presented. The analysis and design of the framework of multi participant project management system based on SOA were given, which focused on technology implementation of different service layers. Then taking into account the features of multi-participant project, an implementation mechanism of portal and rights management architecture was proposed.