Ventilated sound insulation window

The invention relates to a ventilating dead window, which is characterized in that the window includes an internal window frame and an external window frame which are arranged inside a window aperture, and a space is left between the two window frames; a plurality of vertical mullions are arranged at the opposing positions on the two layer of window frames, and a vertical glass partition is arranged on each of two opposing vertical mullions and divides the space between the two window frames into a plurality of independent cavities, and a hole is arranged on the vertical glass partition to communicate with the neighboring cavities; at least one swing-in casement window is arranged on the internal window frame at one side, and at least one swing-out casement window is arranged on the external window frame at the other side. The invention divides the cavities between the two window frames into a plurality of cavity bodies, at the same time air inlets are arranged at the different positions of each glass partiti