The report of the 18th National Congress of the Communist Party of China proposed to focus on maintaining the Party's advanced nature and purity, and to carry out in-depth education and practice activities of the Party's mass line with the main content of being pragmatic and honest for the people. Efforts should be made to solve outstanding problems strongly reflected by the people and improve the ability to do mass work well under the new situation. Under the new historical conditions, this is an important measure for our party to accurately grasp the international and domestic situation, properly cope with the test, resolve risks and strengthen party building by using Marxist party building theory. It is also a basic project to promote the new great process of party building. The author thinks that there are the following points: first, the nature of the party determines that our party must carry out mass line education for a long time. China is the vanguard of the working class in China, the people of China and the Chinese nation, representing the fundamental interests of the overwhelming majority of the people in China, which requires us to represent the broad masses of the people. Secondly, the party's purpose determines that our party must carry out mass line education for a long time. The party's aim is to serve the people wholeheartedly, which requires our party to take the interests of the broad masses of the people as the center and serve the broad masses of the people. The third necessity, the party's guiding ideology, determines that our party must carry out mass line education for a long time. Marxism–Leninism, Mao Zedong Thought, Deng Xiaoping Theory, Theory of Three Represents and Scientific Outlook on Development all shine with the brilliance of the mass line. For example, history is created by people; Only the people are the real driving force to create history; The essence of socialism is to eliminate exploitation, eliminate polarization, liberate productive forces and achieve common prosperity; Representing the fundamental interests of the overwhelming majority of the people; Building the Party for the Public and Governing for the People. The fourth necessity, the party's ideological line, shows that our party must carry out mass line education for a long time. Emancipating the mind, seeking truth from facts, advancing with the times, seeking truth and being pragmatic are the core contents of the party's ideological line, and seeking truth and being pragmatic is one of the themes of mass line education practice activities. The fifth necessity, the party's mass line, determines that our party must carry out mass line education for a long time. As one of the party's three magic weapons, the mass line requires us to strengthen our flesh-and-blood ties with the people. The sixth necessity, the greatest advantage of the party, determines that our party must carry out mass line education for a long time. The greatest advantage of our party is close contact with the masses, which must be maintained and carried forward, which requires us to do a good job in mass line education, otherwise we will lose our advantage. The seventh necessity, the greatest danger of the party, warns that our party must carry out mass line education activities for a long time. The biggest danger after the party is in power is to be divorced from the people. To avoid danger, the most important thing is to carry out mass line education activities. The eighth necessity, the test faced by the party, determines that our party must carry out mass line education activities for a long time. Without a solid foundation-the support and support of the people-it is impossible to withstand the "four tests" of governance, reform and opening up, market economy and external environment. The ninth inevitability, bureaucracy, formalism and negative corruption in some parts of the party, determines that our party must carry out mass line education. At the celebration of the 90th anniversary of the founding of the Party, President Hu Jintao emphasized that "coming from the people, rooting in the people and serving the people are the foundation for our party to remain invincible forever." And some of our comrades are just the opposite now. If we do not strengthen the mass line education and let it develop, it will inevitably hurt the "body" of the party. The tenth necessity, the party's experience determines that we must carry out mass line education. The five years between the two party congresses is not only a pioneering work to strengthen and improve party building, but also a successful experience of party building work in these years. 65438-0998' s party spirit and style education with "stressing study, politics and healthy atmosphere" as the main content; In 2004, an educational activity to maintain the advanced nature of employees was carried out with the practice of Theory of Three Represents as the main content; In 2008, I thoroughly studied and practiced Scientific Outlook on Development activities.