Abstract: Hu Jintao's thought of economic integration is an important component of the Scientific Outlook on Development, an important component of Hu Jintao's economic thought, and a new theoretical achievement of the sinicization of Marxist economic development thought. Focusing on such important issues as what kind of development and how to develop land-sea economic integration in the new century and new stage is an important historical moment at the turn of the century and the turn of the Millennium, the strategic thinking from the perspective of the future of China's economic development is to consciously apply Marxist outlook on nature, practice, and the masses to respond to the new requirements of China's land-sea economic integration across the century It is a new summary of the first important task, core, basic requirement and fundamental method of the economic integration of land and sea. All these are of great value to promote the economic integration of land and sea in the new era.