Abstract: After the expansion of higher vocational education, the source of students shows a diversified trend, and there is a wide gap in the age of students. There are both fresh and former high school and secondary school graduates, covering the employed and unemployed. This paper combined with higher vocational enrollment expansion of different students learn sentiment analysis, analyze the enrollment expansion in higher vocational colleges teaching a series of problems and challenges faced by millions, research analysis of the advantages of higher vocational colleges to implement Seminar teaching as well as the factors that influence the teaching of Seminar to build to the current situation of vocational colleges million expansion to learn Seminar teaching mode.. Under the background of one million enrollment expansion, students with different academic starting points, different learning objectives and different social outlets can successfully complete their studies.

Key words: Million expanded enrollment, Accurate teaching, Seminar teaching mode, Cultivation of talents