Abstract: Analyzed the limitations of MET algorithm and feature of out-of-core, mixed ideas of the two algorithms and then giving a method called DRMET which based on the strategy of dividing and ruling for multi-aspects data mining;avoid the problem of "dimension disaster" while overcomed the MET's limitation of low efficincy, and inherit its advantage on small memory consumed;experiment gives the result: new algorithm reduced time cost from MET substantially, its efficiency improved about 1.86~15.85 times compared to MET.