Marx's theory of natural force resources is an indispensable part of Marx's economic theory. Natural force resources, as a kind of natural elements that do not cost a penny, are added to the production process free of charge, and play a special role in the production process. Grasping and understanding the scientific connotation of Marx's theory of natural force resources is of great theoretical value and practical significance for promoting the harmonious unity of man and nature and adhering to the strategy of sustainable economic development.