Flexible damping sound insulation board based on phononic crystals and production process of flexible damping sound insulation board

The invention discloses a flexible damping sound insulation board based on phononic crystals and a production process thereof, and belongs to the technical field of sound insulation. The production process of the flexible damping sound insulation board based on the phononic crystals comprises the steps that flexible particles with different particle sizes are placed in a mold, excitation oscillation is applied to the mold, and the flexible particles with different particle sizes are formed; the method comprises the following steps of: layering flexible particles with different particle sizes, periodically arranging the flexible particles to form at least two layers of porous photonic crystal cavity structures, adding glue into a mold to form a mixture, applying pressure to the mixture for molding, taking out the molded mixture, and cooling to form the flexible damping sound insulation board. According to the flexible damping sound insulation board based on the photonic crystals and the production process of t