Marxism is an open theoretical system,a critical theory that"revolutionizes the existing world".Un-der the new historical conditions of the 20th century,Lukacs,a representative figure of Western Marxism,tries to construct his own theoretical growth point by exploring the dialectical logic of historical materialism,i.e.,to un-derstand and expand Marxism from a diversified perspective.Studying the logical starting point of Lukacs'interpre-tation of historical materialism is an important reference to understand and grasp the true connotation of Marxist doc-trine in close connection with the current social background.