This article is based on tracking data of 7,411 first-year high school students from 106 secondary vocational schools in Zhejiang and Shaanxi Provinces from 2011 and 2012 and analyzes the impact of the experience of being left-behind on the exam behavior, dropout behavior, and willingness for promotion of secondary vocational school students. The authors find that when not controlling other factors, there are group differences among left-behind children, migrant children, and nonmigrant left-behind children on participation in the high school entrance exam, dropout rates, and plans to attend vocational college. However, when controlling other factors, there are no significant differences between left-behind children and non-left-behind children in exam behavior, dropout behavior, and willingness for promotion, and there is no significant impact during the period they are left behind on the exam behavior, dropout behavior, and willingness for promotion of vocational secondary school students. Therefore, using instrumental variables or other identification strategies is a possible direction in this field of study. [This article was translated by Jeff Keller.]