Melzell’s metronome is pyramid-shaped, with a clock structure inside, gears and a clockwork, which drive a pendulum rod, and each time the pendulum rod swings, it makes a sharp "tick" sound. This is the tick metronome. The source of the name. Combining the dual advantages of mechanical metronome and electronic metronome, it is portable and easy to use. Metronome has the following advantages 1. The metronome can cultivate the concept of speed 2. Make the performance more complete and stable, and the rhythm more even 3. Concentrate your attention and improve the efficiency of piano practice Fourth, make the playing technique solid and the memorization more accurate and firm 5. Conducive to the establishment of awareness of accompaniment, group playing, ensemble and concerto In summary, we believe that the metronome, a wonderful mechanical device, will play its active role more extensively and long-term in the teaching of instrumental music, especially piano teaching.