本文结合数学新课标的要求,通过对几则数学课堂低效导入案例的分析,提出了数学课堂有效导入必须遵循愉悦性、目的性、主体性原则,并着重探讨了数学课堂有效导入的策略:创设趣味型问题情境,让学生在愉悦中参与新课学习;凸现教学主线,让学生围绕学习目标进入新课学习;创设最近发展区,让学生在积极思维中走进新课学习. According to the requirements of the new math curriculum, this paper analyzes the inefficient introduction of several math classrooms and puts forward that the principle of dexterity, purpose and subjectivity must be followed in order to effectively introduce the math classroom. Create fun-oriented problem situations so that students can participate in the new lesson in pleasure. Highlight the main line of teaching so that students can enter the new lesson around their learning goals. Create a recently developed area for students to enter the new lesson in positive thinking.