Electrical sound insulation bottom box

The utility model discloses an electrical sound insulation bottom box, which comprises an inner shell, an outer shell and a sound insulation layer arranged between the inner shell and the outer shell, both the inner shell and the outer shell are of a box-shaped structure with an opening at one end, a plurality of inner threading holes are arranged on the side wall of the inner shell, a plurality of outer threading holes are arranged on the side wall of the outer shell, and the inner threading holes are communicated with the outer threading holes. The inner threading hole and the outer threading hole are oppositely arranged, and a notch is formed in the sound insulation layer between the inner threading hole and the outer threading hole; when the threading pipe penetrates into the inner shell through the outer threading hole, the sound insulation layer and the inner threading hole, the notch wraps the threading pipe. The bottom box has good sound insulation and noise reduction effects, the threading holes are