Abstract: With 3D Solid Structure becoming the main expression and the expression of 3D
design and 2D engineering graphics being equally important, teaching reform of knowledge
structure system is deepening. More and more people begin to realize it and the amount of
relevant papers is continuously increasing. This is because that, with the development of computer
science and technology, computer technology has gradually spread into the fields of other
sciences, having changed the structure of industries in the society, and, as one of the oldest
subjects, engineering drawing is also meeting the revolution brought by the new technology era.
So, in order to conform to the development of the times, it is the inevitable trend of the
development of history that the expression of 3D by 2D projection transits to direct 3D design in
graphics education.
Based on the practical experience of teaching“3D mechanical drawing”for more than a
decade, aiming at how to improve students’ spatial imagination ability and to finish the transit 2D to 3D, this paper summarizes the educational reform practice in these years as well as the
author’s own teaching practice and reflection on it.

Key words: 3D mechanical drawing, teaching practice and reflection, cultivation of drawing
reading ability