Abstract: Based on the historical stages in the study of the Party's history, the article respectively expounds the security thoughts formed by the Communist Party of China in the practice of safeguarding national security and its security strategy and security actions under their guidance, clarifies the development meridians of the Party's national security thoughts. On this basis, the basic characteristics and historical experience of the Party's national security thought are summarized, and the evolution law of her national security thought is fully grasped, so as to explore the future development direction of the Party's national security thought. Taking care of the present and seeking the future from the past is of great significance for the CPC to continue to better respond to various security challenges, effectively safeguard national security, and promote the positive interaction between national security thought and national security practice.