Sound insulation through-wall wire passing structure

The utility model belongs to the field of sound insulation devices, and particularly relates to a sound insulation through-wall wire passing structure which comprises a through-wall box. A threaded groove is formed in one side of the through-wall box, the inner wall of the threaded groove is in threaded connection with a screw, and one side of the through-wall box is fixedly connected with a cover plate through the screw; by pushing push plates, an L-shaped rod, a connecting rod, a push block and an extrusion block can be driven to move towards one side, first springs are extruded, the two groups of push plates are pushed at the same time, the two groups of push blocks can be moved away, the inner wall of the through-wall box can be expanded, so that a wire can pass through conveniently, and after the wire passes through, the two groups of push plates are loosened, so that the two groups of first springs lose thrust to reset. When the wire passes through the through-wall box, the two groups of push blocks can