President Li Xianyang has been devoted to the research of mathematics teaching since he taught, and has gradually formed his own teaching style. He has served as an open class, demonstration class and observation class of mathematics teaching at provincial, prefectural and county levels for many times, and won the first prize of quality class in Shandong Province. He edited and participated in many books and published many papers in various journals, which played a positive role in promoting mathematics teaching in this region.