Abstract: A hybrid encoding scheme is proposed to organize and manage XML efficiently with relational database.Vectors encoding scheme is improved,and vectors gradients are utilized to identify XML nodes position information,combining with nodes path information;which supports nodes mapping and location,avoids re-encoding caused by data update,and achieves quick path query.The hybrid encoding mathematic model,data model and relational schema are established.Performance analysis and experiment results show that,the hybrid encoding scheme can support XML query,update and reconstruction well and validly.