On the basis of the analysis of materialism,dialectics,historism and political progressivism,Alain Lipietz figures out the family resemblance between political ecology and Marxism,but he actually only stands on the empirical level when he tries to catch the right meaning of Marxism so that he can neither understand correctly the real contents of the concepts of history,material and dialectic in historical materialism,nor catch the humanistic significance of historical materialism.Alain Lipietz also figures out the basic difference between political ecology and Marxism from the perspective of productivism,primacy of producers,progressivism and the determining moment of historical change,which,in my opinion,is also based on the misunderstanding of Marxist viewpoints about the contradiction between productive force and productive relations.