The invention belongs to the technical field of decorative materials, and relates to a floor capable of efficiently and stably releasing negative ions, which comprises a high-density
fiberboard base material, a negative
ion impregnated bond paper layer arranged on the upper surface of the base material, and a balance layer arranged on the lower surface of the base material, the negative
ion impregnated bond paper layer contains a negative
ion additive, and the negative ion additive contains
tourmaline and
terbium oxide. The invention further discloses a preparation method of the floor. By optimizing the mixing and
coating process of the negative ion additive and the dipping glue, a uniform negative ion
coating with a micropore slow release function is formed on the surface of the floor, high-concentration negative ions are continuously released in a
normal state, the actually measured release concentration can reach 5000 / cm < 3 >, and the
indoor air quality is remarkably improved; the surface of the floor is subjected to
mortar enhancement treatment, the
wear resistance is excellent, and functionality reduction caused by
daily wear is avoided; negative
ion release is stable, the service life is long, air can be continuously purified, and
human health is facilitated.