The logic of capital is the core perspective of Marx's dissection of capitalism, and it is also the theoretical support for his vision that communism will eventually come true. In accordance with Marx's Economic Manuscript of1857 — 1858, and starting from the cause of the capital movement, the logic of capital can be understood as the internal law of capital dialectical negation movement, with negativity and inevitability as the core provisions. Based on the logic of capital as a clue, Marx revealed the inner roots of capitalist social problems and demonstrated that communism will eventually be realized. Capital itself is the top limit to its own development. The illusion of equality in the commodity economy hides all the inverted relationships and false logic behind it. Capitalism will eventually perish due to its self-denial. However, the rich material wealth and world relations accumulated during the period of capital’s glory will provide conditions for the realization of communism. Key words: capital logic; negativity; inevitability; historical materialism