有一类对称或循环不等式的证明采用配方法(有外国学者称为SOS方法)进行处理,不仅体现数学的对称美、和谐美,而且这种方法不需要太多技巧,很容易被老师和学生接受,整个证明过程给人以优雅和美的享受.本文通过一些竞赛题加以阐述,以期待读者进一步的研究. There is a class of proofs of symmetry or circular inequality that is formulated using a formulation method (known as SOS by foreign scholars) that not only reflects the symmetrical beauty and harmonious beauty of mathematics, but also does not require too many tricks and can be easily accepted by teachers and students , The entire proof process gives people the enjoyment of elegance and beauty.This article elaborates through some competition questions in order to look forward to the readers for further research.