Evaluation　and　Ranking　decision　making　units　with　independent　subsystems　is　one　of　the　hot　problems　in　the　area　of　data　envelopment　analysis(DEA)　research.　Applying　the　virtual　optimal　frontier　surface　concept,　this　paper　puts　forward　the　output　and　input　non-radial　two　-　stage　C2GS2　data　envelopment　analysis　model　for　evaluating　and　ranking　the　decision　making　units　with　independent　subsystems　based　on　the　non-equal　proportion　expansion　or　reduction　thoughts.　The　method　in　this　paper　which　has　fewer　calculation　is　objective　and　optimal,　so　it　is　a　operable　and　practical　DEA　ranking　method.　©　2010　IEEE.