Mathematics is an art of application. It is one of the important objectives of mathematics to apply mathematical knowledge to solve practical problems. The key of mathematics teaching is to teach students to solve practical problems with the knowledge they have learned. However, most of them have weak application consciousness and ability. In the long run, it will be useless to learn. It can not meet the needs of the development of the army. Therefore, it is particularly important to cultivate students' awareness of mathematics application and improve their ability to solve practical problems by applying mathematical knowledge.