Eco-criticism argues that literature criticism should be concerned with the“real”natural things on the earth，but when it equals the nature in literature works to the physical environment around the human society and applies evolutionism and other ecological theory in criticism，it often drops into the dualism which it tries to overcome. This article argues that nature in literature is neither the objective nature in science nor the subjective imagination of the author. Nature in literature belongs to a‘living world’constructed both by the real things in environment and by cultural view. By showing diversified human-nature relations in the living world described in literary works，Eco-criticism can help the readers to get rid of the influence of dualism in human-nature relation gradually.