Major commemorative activities can carry and transmit the content of ideological and political education, with distinct political nature, extensive participation and strong characteristics of the times. Therefore, major commemorative activities have the function of ideological and political education. The ideological and political education function of major commemorative activities is mainly manifested in strengthening political identity, condensing value consensus and enhancing mission responsibility. By enriching the forms of practical activities, widely using new media and realizing the organic unity of family, school and society, we will give full play to the ideological and political education function of major commemorative activities, so as to cultivate qualified builders and reliable successors for the cause of socialism with Chinese characteristics.