The invention relates to a vibration-reducing and damping structural part of a portable electronic device and a notebook computer. The vibration-damping structural part of the portable electronic device includes: a damping cavity, which is opened on the casing of the portable electronic device; a cover plate, which covers the damping cavity; and a vibration-damping component, which is placed in the above-mentioned damping cavity. The above-mentioned damping cavity can be independent, or divided into several sub-damping cavities by partitions. The vibration-damping components mentioned above can be particles, thin rods, flat plates and the like. The vibration-damping structural components of the portable electronic equipment of the present invention, when periodic or non-periodic vibrations are caused by external forces such as vibration, drop, impact, etc., especially random vibrations, the vibration-damping components enclosed in the cavity move and collide with each other It consumes a lot of energy, absorbs and consumes a lot of vibration energy, and reduces the harm caused by vibration. The damping structure is compact, light and thin, and the damping does not change with temperature in the range of -40-80°C, which is its excellent characteristic.