《数学课程标准》指出:学习和教学方法必须是开放而多样的,开放性是课堂教学评价的一条重要原则。它要求在课堂教学中激发学生的学习活力,不断激起学生的探索、发现、想象和表现的愿望。本文从开放的课堂秩序、开放的师生关系、开放的思考环境、开放的问题空间、开放的数学活动等方面阐述开放式课堂教学。 “Mathematics curriculum standards” that: learning and teaching methods must be open and diverse, openness is an important principle of classroom teaching evaluation. It requires students to be stimulated in their classroom teaching activities and constantly arouse students' desire for exploration, discovery, imagination and performance. This article expounds the open classroom teaching from the aspects of open classroom order, open teacher-student relationship, open thinking environment, open question space and open mathematics activities.