Mind map, as a new thinking tool, has been widely used in reading notes in recent years, which is convenient to sort out the context of the article and memory of knowledge. In the process of memorizing knowledge points, mind map can be used to assist memory. Mind map is a kind of abstract display chart, which can clearly show all the contents of knowledge points. Starting from the basic mind mapping techniques and mental skills, we can learn how to draw a coherent, orderly, hierarchical, focused and logical mind map. This paper introduces the practical application of mind map from the aspects of note taking, writing, activity plan, decision analysis and time and space management.