Abstract: In view of all dimensions and layers of multi-dimension analyzing at the beginning of modeling data warehouse system. A data model evolved easily, as well as corresponding modeling tools are needed for the building of incremental data warehouse. In this paper, a data model supporting model evolving is presented. The model's formalized definition, as well as it's design and impliment on RDB, is introduced. The data model separate data cubes and complicated dimension patterns, and make the measures dimensioned. The flexible structure of multi-dimensional data cube avoid rebuild data cubes caused by the change of measures and layers efficiently. The model stetisfy the requirement of the complicated and continuously changed OLAP.