“三角”是高中教学的重点、难点内容,与其他数学知识相比较为抽象,很多学生学习起来比较吃力,一定程度上影响了高中数学教学效率的提高.鉴于此,本文结合笔者高中数学教学实践,分析学生学习三角知识存在的问题,并提出针对性改进措施,以期为使学生深刻理解三角知识内涵,打牢学习三角知识的基础提供参考. “Triangle” is the key and difficult content of high school teaching. Compared with other mathematics knowledge, it is abstract and many students are struggling to learn. This has affected the efficiency of high school mathematics teaching to a certain extent. In view of this, this article combines the author’s high school mathematics. The teaching practice analyzes the problems existing in students’ learning triangle knowledge, and proposes targeted improvement measures in order to provide students with a deep understanding of the connotation of triangular knowledge and to provide a basis for learning the basics of learning triangular knowledge.