Critical thinking is an important element of all professional fields and academic disciplines. For all the great works, critical thinking plays an important role, critical thinking is a process of consideration and understanding of the known problem and the information receiver will consider and evaluate the problem in new ways. As a teacher, there is an important task that is foster the ability of“critical thinking”, we must always willing and ready to accept the students’ doubts and always cultivate their critical thinking abilities. We also need to doubt, correct and improve ourselves;this is a very good way to enhance our teaching.