The relationship between Marx's dialectics and Hegel's dialectics has always garnered significant attention. This relationship is not only a manifestation of their respective thoughts, but also an important link in the development of dialectics itself. "Inversion" is a significant philosophical concept proposed by Marx during the process of sublating Hegel's dialectics. A thorough analysis and understanding of "inversion" is a crucial link in fully grasping Marx's "critical nature". The dialectics of Marx's "critical nature" is rooted in idealism, and Marx believed that the consequence of this manifestation was the loss of the critical nature of dialectics. To correctly reveal the essence of dialectics, Marx centered on "human practice" as the fundamental method and completed the "inversion" of Hegel's dialectics. Marx inherited the "rational core" of the narrow sense dialectics, which is centered on negation, and discarded the "mystical shell" of the broad sense dialectics. At the same time, he re-inverted the relationship between spirit and reality that had been inverted in the "rational core", thereby highlighting human subjectivity and giving dialectics a revolutionary and critical nature.