The relationship between commodity circulation and currency circulation was scarcely referred in past literatures. This thesis defines commodity circulation and currency circulation, and discusses the relationship between the two subjects from static and dynamic perspectives based on Marxism theory. The thesis finally comes to the conclusions as: (1) Currency circulation subjects to commodity circulation in four respects; (2) Currency circulation is not the passive result of commodity circulation. It can influence as well as determine commodity circulation to some degree; (3) Separation and coupling are two aspects of the relationship between the two subjects. Separation is resulted from the deepening of the currency functions and development of the credit forms. Coupling is the natural requirement of modern commodity economy and risk-interest tradeoff mechanism.