The teaching reform in the new era requires that teachers and students should be encouraged to participate in classroom teaching as much as possible in the current mathematics classroom teaching, and strive to realize the teaching concept of "learning as the main body and teaching as the leading factor". One of the goals of mathematics class and classroom teaching is to let students learn classroom knowledge, at the same time, let students experience and understand mathematical thinking methods constantly, so as to improve their own mathematical quality imperceptibly. So, how to effectively implement this guidance? By constantly asking questions, it is one of the main ways for teachers to let students think and answer teachers' questions independently, and optimizing the art of asking questions is a problem for teachers to study.