A sound insulation composite a wall and floor board, including a sound insulation sheet material and a sound insulation binder for adhering the sound insulation sheet material to the wall and floor of the building. The sound insulation sheet material comprises a substrate and a glaze layer adhered on the substrate, the sound insulation binder includes, by mass fraction, 25-30 parts of an inorganic gel, 1-5 parts of a modifier, 0.3-0.5 part of anti-cracking reinforced fiber, 5-8 parts of a sound absorbing material, 40-60 parts of a filler, 0.3-0.6 part of a water retaining agent, 0.1-0.5 part of an activation activating agent, 0.2-0.8 part of a superplasticizer, 0.1-0.3 part of a hydrophobic powder and 0.1-0.6 part of a dispersant. The sound insulation sheet material contains a large amount of interconnected micro voids, and sound waves can penetrate deep inside the material along these pores and generates friction effect with the material, so that the acoustic energy is converted into heat energy. In addition, the sound insulation binder contains the sound-absorbing material consisting of an unconsolidated porous material, which has gradually increased sound absorption coefficient from low frequency to high frequency, so that the sound insulation binder has good sound absorption effect on high-frequency and intermediate-frequency sound.