Dialectic is not only a familiar category but also an ever new issue at all times.The nature of dialectic is the nature of philosophy,so the research on dialectic problems is essentially a research on philosophic problems in general.Currently the question of what dialectics is and the relationship between dialectics and metaphysics is an academic hotspot,yet it is ambiguous with different viewpoints.At the same time,how to compartmentalize the theoretical morphology of dialectics,and how to persevere in the scientific attitude to dialectics restrict the studies on dialectic theory.