The utility model discloses a layer structure and sound -proof wall matrix group are scribbled in sound insulation, wherein sound insulation is scribbled the layer structure and is included: the dopelayer, the slag, the slag is located in the dope layer. The utility model discloses thereby the joining slag formed a phonon crystal structure during technical scheme passed through the dope layer, and it is the structure that distributes an elastic constant and density cycle, and when the elastic wave was propagated in the layer structure is scribbled in sound insulation, the internal structure who receives sound insulation to scribble the layer structure acted on, was propagated by the separation in certain frequency range, consequently had good sound -insulated noise reduction effect. The layer structure is scribbled with the form of scribbling the layer structure on attached to the wallboard to sound insulation, simple structure, and it is convenient to make, production that can the scale.