Environment-friendly interior decoration sound insulation board

The utility model relates to the technical field of sound insulation plates, in particular to an environment-friendly interior decoration sound insulation plate which comprises a back plate, a first sound insulation plate is fixedly mounted on one side of the back plate, a second sound insulation plate is fixedly mounted on the other side of the first sound insulation plate, and a splicing assembly is arranged on the side of the first sound insulation plate. The splicing assembly comprises inserting plates fixedly installed on the two adjacent side edges of the first sound insulation plate, and splicing grooves matched with the inserting plates are formed in the other two adjacent side edges of the first sound insulation plate. According to the environment-friendly interior decoration sound insulation board, during splicing and nesting of two adjacent boards, the two boards can be directly and tightly spliced only by embedding the inserting boards into the splicing grooves and extruding the elastic strips on