Abstract: Cultural self-confidence refers to the firm belief and conscious practice of the national culture and spirit. General secretay Xijingping intrepret cultual self-confidence as the fourth confidence, the first three are road confidence, theoretical confidence and institution confidence, which is the most deepest level and alreody formed the complete thought system in the new histroial condition. Xi Jinping's thought of cultural self-confidence mainly include the following aspects:Strengthen the strategic position of cultural self-confidence:the need to build up our own discourse system, the need to cenhance international competitiveness, and the need to strengthen the direction of socialism with Chinese characteristics; The root cause of Cultural self-confidence:the spiritual source of cultural confidence is the excellent traditional cultural the core pillars of cultural self-confidence are the revolutionary culture and the advanced socialist culture; the basic reliance of cultural self-confidence is Chinese Marxism. The basic way to enhance cultural self-confidence, which are remember the guidance for the ideology, keep the original culture in mind, assimilate the external culture and turn the face to the future cultural development. Lucubrate Xi Jinping's thought of Cultural self-confidence is of great significance to oppose the national and historical nihilism, build up strong socialist cultural power keep the direction of the development of Chinese socialist cause and realize the great rejuvenation of the Chinese nation.