Building sound insulation decorative plate

The utility model provides a building sound insulation decorative plate which comprises a plate body, a fixing plate and a connecting plate are arranged on the two sides of the plate body respectively, the fixing plate is located in the plate body, one end of the connecting plate is located on the outer side of the plate body, a containing cavity is formed between the fixing plate and the connecting plate, sound insulation cotton is arranged in the containing cavity, and the sound insulation cotton is arranged in the containing cavity. A connecting cavity is formed in the side, away from the connecting plate, of the fixing plate, the connecting plates of every two adjacent plate bodies are clamped into the connecting cavities, and limiting assemblies matched with the connecting plates are arranged in the connecting cavities. Compared with the prior art, the utility model has the following beneficial effects: through the arrangement of the limiting assembly, two adjacent plate bodies can be aligned during asse