日记是大家熟悉的字眼，但在老师、家长的眼中，它似乎是语文教师的“专利”。笔者在指导学生学习数学时，偶然尝试用上它，觉得魅力无穷，收获不小。数学日记是学生学习足迹的记录，它把学生的实践、创造、发现等心理过程真实地记录下来，让学生倾诉成功的快乐，探索的乐趣。 Diaries are familiar words, but in the eyes of teachers and parents, it seems to be a “patent” of language teachers. When I guide students to learn mathematics, I occasionally try to use it, I feel endless charm, not small gains. Diary of mathematics is a record of students 'learning footprints. It realistically records the psychological process of students' practice, creation and discovery so that students can talk about the joy of success and the pleasure of exploration.