不等式作为高中数学教学的一个重点和难点,一直得到广大教师的重视.由于其证明方法的多样性,以及与其他知识的融合性,导致其在训练学生思维上具有独特而深刻的作用,试题在各级竞赛中屡见不鲜.本文试图通过教材例习题的证明思路,谈谈结构分拆在一类对称型不等式证明中的妙用,供? As an important and difficult point in high school mathematics teaching, inequalities have always been valued by teachers. Due to the diversity of its methods of proof and its integration with other knowledge, it leads to its unique and profound role in training students’ thinking. It is not uncommon for competitions at all levels. This article attempts to explain the magical use of structural splits in the proof of a type of symmetric inequality through the proofs of the textbook example exercises.