Abstract: The course of NC machining technology and programming is an important professional education course for the major of mechanical design, manufacturing and automation. However, its content is complex, practical, and there are many similar knowledge points, which makes it difficult for students to distinguish and study. In order to improve students' learning efficiency and logical thinking, and cultivate students' learning initiative, the idea of mind map is applied to the mixed teaching practice of "NC machining technology and programming" based on "MOOC resources + network platform + rain classroom", which is convenient for students to clarify the context of knowledge, and to remember and understand.

Key words: NC machining technology and programming, Mind map, Rain class