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　implement　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　avoids　rebuild　data　cubes　caused　by　the　change　of　measures　and　layers　efficiently.　The　model　satisfies　the　requirement　of　the　complicated　and　continuously　changed　OLAP.