Plane Constitution as the first stage in the teaching of "Three Major Constitutions", serves as a "bridge" for product design majors as it helps the students to change from painters to desingers. Today many China's colleges and universities of professional art and design offer courses like "Three Major Constitutions", and this course "Plane Constitution" is playing an increasingly significant role in the teaching, practice and core curriculum development of product design.In this paper, the author reviews the current teaching situation and explores existing problems in the course of "Plane Constitution".