摘要:As demand of China’s social construction increasing and as the development of vocational education, polytechnic school plays an increasing important part, which , on the other hand, constitutes unprecedented challenges to the teaching in polytechnic schools. Most students, in the aspect of vocational education, are those from middle schools who have difficulties in their study. These students are entitled “Underachievers”. They are short in intellectual study and poor in curricular foundations. Teaching tasks cannot be satisfactorily accomplished in many of the polytechnic schools for the increasing number of underachievers. What have been harnessing the polytechnic school development is the poor study effect of these students. In this article, the internal reason of character and the external reason of social influence are analyzed as the cause that contributes to learning difficulties. And this article offers a pragmatic set of ideas for underachiever transformation.