The average student always likes to laugh and humor, so the role change is very important. Whether students play the role of learning subject is closely related to the attitude of teachers, but they refuse to be serious in their hearts. As a Chinese teacher, we should first have a sense of responsibility and sacredness, break the sacred frame of "the dignity of teachers", be a cynical teacher, be a tolerant and appreciative teacher, be an amiable teacher, be a severely criticized teacher and be a narrow-minded teacher, so teachers should update their concepts.