National security is a cornerstone for a political party's governance and national development. Since the 18th CPC National Congress， General Secretary Xi Jinping has attached great importance to China's national security. Based on "two fundamental situations （the great rejuvenation of Chinese nation domestically， and the worldwide profound changes unseen in a century）"， he has gradually formed a unique overall view on national security in practice. He makes an original contribution to Marxist national security thinking through emphasizing three aspects： its status， its wholeness， and its priorities， which has functioned as a guidance to action for the whole Party， the whole army and the whole nation in safeguarding national security in the new era.