Abstract: The main faults of abstract nature viewpoint are that they separate the relations between nature and human,nature and society and natural science and science of human.It uses a non-practical mode of thinking to realize the relations.Marx' s actual natural viewpoint discussed dialectical unity relations between nature and human,nature and society and nature science and science of human.His humanized nature viewpoint summarized the objectivity relations of cognition and practice between nature and human;His historic nature viewpoint summarized the relations based on practice between nature and society;His anthropology nature viewpoint discussed dialectical unity relations between science and science of human.His ecological nature viewpoint summarized the value relations between nature and human.Marx' s actual nature viewpoint has many-sided meanings in dealing with ecological crisis.