Problem-based learning(PBL) is a student-centered educational method to enhance the student to solve the real question ability,comprehensive information application and deep level understanding knowledge ability.PBL is a new teaching model to combine tightly knowledge,newest progress and the need of society.PBL covers various knowledge skills train-ing to help teacher improving education method,reform teaching model,exert student’ s initiative,cultivate self-directed learning strategies,develop high-level ideation and extend contents of courses.