The slotted sound-absorbing board, with its unique porous structure and slotted drilling design on the finished board, achieves efficient sound absorption effect, and its sound absorption performance for medium to high frequency sound is particularly significant. This type of board not only has excellent noise reduction ability, but also has a wide range of applications, suitable for offices, conference rooms, home theaters, sports venues, shopping malls, cinemas, lecture halls, music halls, recording studios, government auditoriums, hotels, restaurants, KTV bars, television stations and many other places that require sound absorption and soundproofing, providing highquality acoustic solutions for various environments.