Yang Hui was a famous mathematician in the Southern Song Dynasty. He was born in Hangzhou, Zhejiang Province, and almost always stayed in his hometown of Suzhou and Hangzhou when he served in the imperial court. Yang Hui is honest and deeply loved by ordinary people. He has a deep study of arithmetic, and later generations will combine him with Qin, Li Zhi and Zhu Shijie? Four masters of mathematics in Song and Yuan Dynasties? . Yang Hui's well-known triangle is his most important research achievement. Yang Hui left a lot of mathematical works in his life. Books such as Nine Chapters Algorithm, Daily Algorithm, Multiplication and Division, Changing the Background, etc. are all the algorithmic theories put forward by him according to the places where ordinary people need to use arithmetic in their lives to help them quickly calculate their own needs. Yang Hui can be said to be the first person in the world to arrange vertical and horizontal maps. He recorded the algorithm of vertical and horizontal graphs in detail in the algorithm of extracting odds from ancient stories, which made great contributions to world arithmetic. During the Southern Song Dynasty, commerce and handicrafts developed gradually, and social economy also improved steadily. People often use arithmetic in trade, but there was no systematic algorithm at that time. Yang Hui gradually realized that ordinary people need some more convenient calculation methods. In fact, practical calculation books appeared in the late Tang Dynasty, but most of these books were lost in the Song Dynasty. On the basis of summarizing the previous mathematicians' research, Yang Hui kept innovating and made great contributions to China's arithmetic. Yang Hui's improved multiplication and division operation technology has benefited users a lot. Since then, the operation has become simpler and the operation speed and accuracy have been further improved. While improving the algorithm, Yang Hui also put forward some practical and memorable operation formulas, such as? Back to ten? 、? Return from the top? Wait a minute. Yang Hui is not only a mathematician, but also an excellent educator. He devoted his life to the great cause of mathematics education. We should learn from his dedication.