In the face of the conflict between reason and freedom,Kant divided the possibility of preserving freedom in the field of things self,and depended the realization of freedom on human beings who follow pure rational rules and act in accordance with moral laws.In order to ensure the freedom of man,Kant had to establish the existence of God.However,to include God means to push realization of freedom to heaven,which suffocates the realistic vitality of Kant's view of freedom.Different from Kant's abstract view of freedom,Marx's view of freedom starts from the realistic man,rooted in the real material world,finds the realistic path to realize freedom,and overcomes and surmounts Kant's view of freedom and its realistic dilemma.