Audio connecting line

The invention discloses an audio connecting line which comprises a connecting line body, a wire penetrates through the connecting line body, the connecting line body comprises an inner supporting body and an outer wrapping layer, a shielding layer is arranged between the inner supporting body and the outer wrapping layer, and the inner supporting body comprises an outer supporting ring, a central supporting column and a plurality of connecting parts. The outer supporting ring extends inwards to form a connecting part, the inner side of the connecting part is connected with the central supporting column, a cavity is formed in the outer supporting ring, in the cross section of the inner supporting body, the area of the cavity accounts for 30%-70% of that of the cross section, and a plurality of wire penetrating holes used for containing wires are formed in the connecting part. The distances from the centers of at least two of the threading holes to the shielding layer are different, and a wire can be selectivel