In the 19th National Congress, General Secretary Xi Jinping said that we should train a large number of strategic talents of international level, leading talents in science and technology, young talents and high-level innovation teams. In the significant period of the realizing a well-off society, the cultivation of talents is the most important thing. In this paper, the author discussed the concept, principle, measures and effectiveness of the Second Class based on extracurricular activities, and put forward effective solutions to the existing problems of the Second Class with the purpose to benefit the educational function.