To improve the enthusiasm of learning mathematics, we must strive to cultivate students' interest in learning mathematics. Interest is the best teacher. The famous educator Suhomlinski once said: "Teachers are eager to impart knowledge if they don't try their best to make students enter an emotional and intellectual state. Then, this kind of knowledge can only make people have an indifferent attitude. However, emotional mental work will bring fatigue. To stimulate students' interest in learning mathematics, we should do the following: 1. Pay attention to introducing new courses. As the saying goes, "A good beginning is half the battle". There are many ways to introduce, such as reviewing old experience, hands-on practice, asking questions, demonstrating teaching AIDS, and direct introduction. Teachers should follow the requirements of the new curriculum. For example, in the introduction of quadratic function, students can use questioning and hands-on exercises to form a rectangle with 20cm long lines to see who has the largest area and how to enclose it. The congruent part of a triangle can be introduced by reviewing the similar contents of the triangle and then introducing a new lesson. 2. In the new class or review class, we should gradually infiltrate all kinds of mathematical ideas, instead of just mastering the exercises in books. "It is better to teach people to fish than to teach them to fish." Common mathematical thoughts include equation thought, combination of numbers and shapes, whole thought, classified discussion thought, movement thought and reduction thought. For example, division is classified as multiplication by "dividing by a number is equal to multiplying the reciprocal of this number"; The idea of solving binary linear equation is to eliminate binary into unitary, so that students can not only solve binary equation, but also solve cubic equation and even higher order equation. Using the idea of motion to master the image of quadratic function, we only need to master the simplest image of y=ax2, and then translate it. Calculations in geometry and analytical expressions of functions often apply the idea of equations. 3. Attention should be paid to the combination of lecture and practice in class. Students have limited attention and can't concentrate for 45 minutes. If the teacher talks too much, no matter how well he speaks, students will inevitably be distracted. After some content is finished, students can not only change the form of classroom content, but also consolidate the content of new lessons, so that students can experience the joy of success and improve their interest in learning.