Sound insulation board

The sound insulation board comprises a sandwich board base body and an inertia amplifying piece. The sandwich plate base body comprises a first layer plate, a second layer plate and a plurality of rib sandwich cores, the first layer plate and the second layer plate are arranged in parallel, an interlayer is reserved, and the plurality of rib sandwich cores are connected between the first layer plate and the second layer plate so as to divide the interlayer into a plurality of cellular spaces. The plurality of inertia amplification parts are in one-to-one correspondence with the cellular spaces, and each inertia amplification part is arranged in the corresponding cellular space and is connected between the first layer plate and the second layer plate, so that the elastic deformation of the first layer plate and the second layer plate is reduced, and the noise isolation is further realized. The inertia amplification pieces act with the sandwich plate base body to form corresponding ultrasonic material cells, th