函数概念是初高中数学教材中都有所涉及的,然而这一概念从初中到高中的发展趋势是由浅入深、由表及里的。初中数学的函数概念比较浅显,主要是为学生进入高中后在基本的知识概念、方法和思想等方面提供参考和铺垫。而高中数学教师要把这一概念作为新知识融入教学中,基于这一概念来对初高中数学教 The concept of function is involved in the textbooks of junior and senior middle schools. However, the development trend of this concept from junior middle school to senior high school is from shallow to deep and from inside and outside. The concept of function of junior high school mathematics is relatively simple, mainly for students to enter the high school after the basic knowledge of concepts, methods and ideas to provide reference and bedding. And high school mathematics teachers should put this concept as a new knowledge into teaching, based on this concept to junior high school mathematics teaching