Cambridge Capital Argument illustrates some logic paradoxes of neo-classic economics with the concepts of Capital Measurement,Re-switching of Technique and Reverse Capital,which is caused by the wrongly commingling of Keynes' economics and the value and distribution theory of neo-classical economics,neglecting the special competitive relation of the capitalism.In contrast,Marx's economics deeply studied economic relations among the total variables on the basis of social relations.Thus,the only solution to this argument is to introduce the classic general equilibrium analysis of social relation.