Application of plant ash and sound insulation device based on application

The invention provides new application of plant ash, and in other words, the application of the plant ash serving as sound insulation material. The invention further provides a sound insulation composition and a method for carrying out sound insulation through the sound insulation composition. Most of existing sound insulation material is artificially-composite material made of rubber, foam, fiber and the like, is poor in sound insulation effect, generally contains components harmful to the human body, damages the environment, and is high in price. Plant ash is wide in source and low in cost and does not contain components harmful to the human body. Plant ash in habitable rooms is equal to a large amount of non-toxic and harmless sterilization medicine. Once abandoned, plant ash can become farmyard manure, rooting agents and seedling strengthening agents which are quite beneficial to growth of crops, and no residue contamination can be formed. Plant ash has the inherent sound insulation performance which is superior to that of various existing natural and artificial material, can be applied to multiple fields, and can well insulate noise.