In teaching, modern information technology should be properly applied to subject teaching, and information technology should be applied to optimize teaching links, so as to make abstract teaching content concrete and clear, make students' thinking actively participate in teaching activities, pay attention to practical operation, scientifically memorize knowledge, help students play their initiative in learning, think positively and explore actively, and make teachers focus on teaching and students focus on learning, thus improving teaching quality, optimizing teaching links and enhancing teaching effect. In this regard, how to use information technology to optimize teaching links is discussed: First, use modern information technology to stimulate students' interest in learning. Confucius said, "Knowing is not as good as being kind, and being kind is not as good as being happy." Learning is hard mental work. Once students are interested in things and have a sense of beauty, they will turn "hard study" into "happy study". Suhomlinski, a famous educator, said: "In the deep heart of man, there is a deep-rooted need to be a discoverer, researcher and explorer. In the spiritual world of children, this demand is particularly strong. " Therefore, how to effectively stimulate students' interest in learning has always been the theme that our math teachers explore, such as changing teaching attitudes and teaching methods. Now the emergence of information technology in teaching has brought a brand-new situation to classroom teaching. First, the application of information technology to optimize teaching links, the introduction of information technology into the classroom, to bring students a sense of freshness. The vivid pictures that appeared on the screen attracted the attention of all the students. High-quality sound effects arouse students' desire and enthusiasm for learning, and orderly changing words no longer make students feel monotonous and boring about mathematics knowledge. The application of information technology in mathematics classroom teaching can strongly attract students, stimulate their curiosity and form the motivation of learning. I use information technology to teach. I first showed the theme pictures on the screen with animation, and added wonderful music, which attracted the attention of my classmates and aroused their strong curiosity. The students are full of longing for the class that the teacher will take, and their learning enthusiasm is very high. Second, fully mobilize the enthusiasm and initiative of students. Promote students' active learning. Practice has proved that when students are interested in information technology teaching, they will have a high enthusiasm for learning. At this time, as class organizers and planners (teachers), we should create various conditions for them to take the initiative to participate and become the masters of learning. So as to enliven the classroom atmosphere and achieve the teaching purpose. Second, the application of information technology to optimize teaching links and improve classroom teaching effect. Using information technology in the classroom can not only simplify and visualize some teaching that teachers and students can't understand, but also facilitate teachers to better break through the key and difficult points of knowledge, vividly show abstract knowledge to students, and turn abstraction into simplicity. From the perspective of students' learning, it is conducive to students' optimization and practice of knowledge and continuous consolidation of new knowledge. (1) In the teaching process, make full use of information technology to assist teaching, change the abstract into concrete, and let students master knowledge emotionally. Teachers organize students to participate in the process of knowledge formation in class, so that students can think, discuss, operate, answer questions, question and summarize appropriately. Under the guidance of teachers, students can acquire knowledge, develop their thinking and improve their ability. (2) Using information technology to optimize teaching links and solve key and difficult problems. Using the explanation and demonstration function of information technology in teaching can turn abstraction into concreteness, induce and inspire students, create a good thinking environment, promote students' brains and let all students think about problems. Through vivid demonstrations and experiments, let students understand, discover and innovate, and break through the key and difficult points of this lesson. (3) Make use of the advantages of information technology to optimize the exercise design in teaching and consolidate new knowledge. The consolidation exercise in the new teaching is to use knowledge to solve problems. At this time, it is not simply to repeat what has been learned in books, which requires teachers to carefully design the teaching process and constantly optimize exercises. Information technology has great advantages in this aspect of teaching. The design of "exercises" is more flexible, which embodies the step-by-step development trend of exercises from easy to difficult, and embodies differentiated education: students begin to change from basic exercises of imitation to judgment exercises set to improve their discrimination ability, and then into comprehensive exercises set to mix knowledge. In addition, starting from the basic problems, teachers design the practical content and gradually increase the difficulty, and design certain tentative exercises and expanding exercises, so that students can understand the internal relations and laws of knowledge, guide students to analyze and solve problems from multiple angles, and at the same time, they can also cultivate students to be innovative and change, so that students can gain both knowledge and wisdom. The application of information technology to optimize teaching links also has great advantages in this respect, which allows students to solve problems in life through multi-level and multi-angle exercises, thus improving their learning ability. In short, we should integrate modern information technology into teaching, use information technology to optimize teaching links, play its leading role, create vivid life scenes and stimulate students' interest in learning. Provide abundant information resources, free students from tedious study, form a learning atmosphere of cooperation, communication and active exploration, improve classroom teaching efficiency, promote the implementation of quality education, optimize classroom teaching and enhance teaching effect. So as to effectively cultivate more cross-century innovative talents.