First of all, the use of piano in music teaching is conducive to students' mastery of intonation. The so-called intonation refers to the pitch in singing and musical instrument performance, which can be consistent with the pitch of a legal system. If a classmate can judge the pitch position of any key of the piano without eyes and ears, and can hum the same pitch as the piano, then we can say that the classmate is accurate, otherwise it is out of tune.

In the process of music teaching, the most troublesome thing is that students don't have a clear concept of the specific pitch of each sound in the singing spectrum. They either sing high bass or low treble, so it is difficult to master the pitch. If the teacher just tells the students which pitch is lower by explaining or gesturing, the students can't grasp it well at all. However, using the piano for music teaching is different. Students can intuitively distinguish the pitch from the sound made by the piano, so as to deepen their understanding of the concept of pitch and better grasp the music works.

Secondly, the use of piano in music teaching is conducive to cultivating students' cooperative ability. Playing a work is not only the coordination of hands and feet, but also the coordination of eyes, hands, feet, ears, mouth and brain. In the process of learning piano, students should know music with their eyes, sing music with their mouths, listen to music with their ears, touch keys with their hands and pedal with their feet, and think about how to fully express the meaning and emotion of music. This complex form of exercise virtually trains students in many aspects, which not only develops their intelligence, makes their minds more flexible, but also strengthens their coordination and adaptability.

Thirdly, finally, the use of piano in music teaching is also conducive to strengthening the unity and cooperation between teachers and students, enhancing the fine skills of the team and improving the overall quality. In piano teaching, students should not only coordinate with the piano, but also cooperate with teachers and students to have a good music class. Therefore, piano teaching can not only improve students' understanding, imagination and creativity, but also establish a good sense of cooperation.

At the same time, the application of piano in music teaching is also conducive to the development of students' comprehensive quality. As piano is a performing art with complex technology and rigorous skills, it is of great significance to improve students' psychological quality and comprehensive learning ability through strict standardization and standardized piano training. The ultimate goal of piano art education is to master piano art with excellent psychological quality, and at the same time improve the ability to learn scientific and cultural knowledge through the excellent psychological quality cultivated by piano art education. It can be seen that the role of piano in music teaching can not be ignored.