In order to improve the all-round development of students' knowledge, ability and quality, based on the discussion on the ne- cessity and practice principle of the second classroom, this paper mainly introduces two kinds of second classroom practice activities. According to the analysis of the questionnaire, most students consider that the second classroom practice is conducive to self-develop- ment.At last, it also gives the points that should be paid attention to when carrying out the second classroom practice activities.