When stepping on the brake, the brake pads are pushed to the brake disc by the cylinder, and the kinetic energy is converted into thermal energy through friction to achieve deceleration. The built-in drainage groove breaks the water film and grinds the chamfer to reduce abnormal noise. In terms of quality, ceramic or semi metal friction layers need to withstand high temperatures of 800 ℃, have low wear, and undergo high-temperature curing processes and compliance certification.