Parent involvement refers to parents involve in children’s schooling. The result of parent involvement on children’s academic area was mixed. Previous studies indicated the role of parenting style in children’s academic development; however, few of them explored the effect of parenting style on the relationship between parent involvement and children’s academic engagement. Moreover, Vocational School Students, as the lost behind students in academic domain, may need more positive support from parents due to their negative experience in school, but the empirical study about Vocational school students is sparse. Hence, the present study aims to investigate relationship among parent involvement, parenting style and Vocational School Students’ academic engagement, tries to identify the mechanism underlie the effect of parent involvement. Parent involvement and parents’ autonomy support/controlling questionnaire as well as academic engagement questionnaire were administered to 513 Vocational School Students and 672 high school students from 18 schools. The Cronbach’s Alpha for the three questionnaires is 0.93, 0.87, and 0.82 respectively. Results indicated that ：1. Social Economic Status (SES)of vocational School Students was significantly lower than high school students (t(1183)=16.35，P<0.00); 2. Parent involvement of Vocational School Students involved less than their counterpart of high school students (t(1183)=5.318，P<0.001); Hence，we can infer that one of the reason for the low level parent involvement in Vocational School may due to their low SES. Parents with low SES may lack of enough skill and knowledge in involving in children’s schooling. 3. Both parent involvement of Vocational School and high school students showed similar types of involvement. Parents involved most in daily care(for vocational school students=3.08±0.79；high school students=3.36±0.76),learning at home was the second, collaboration with community was the last, which suggested that parents in China tend to involvement at home rather than collaboration with school and community due to parents belief towards learning and the insufficient system among parent, school and community. 4. The effect of parent involvement on children’s academic engagement was moderated by parents’ autonomy-supportive/controlling style. The type of learning at home and decision making significantly predicted student’s academic engagement under the autonomy-supportive parenting style（simple slope=0.339， t=7.34，p<0.001， for learning at home；simple slope=1.19，t=3.56，p=0.004，for decision making）, whereas this effect was not found in the controlling parenting style. The present study demonstrated the moderation role of autonomy-supportive/controlling parenting style in parent involvement and Vocational School Students’ academic engagement. One the one hand, it portrait a picture of parent involvement of Vocational School Students；On the other hand，it identified the mechanism of parents involvement , highlighting the moderation role of parenting style in the effect of parent involvement in academic engagement.