Sound-absorbing cotton piece for panoramic ceiling of automobile

The utility model relates to a sound-absorbing cotton piece for a panoramic ceiling of an automobile, which comprises a sound-absorbing cotton piece, extending parts perpendicular to the sound-absorbing cotton piece are arranged on two sides of the sound-absorbing cotton piece in an extending manner, the extending parts are elastic, an upper heat-insulating layer and a lower heat-insulating layer are arranged in the sound-absorbing cotton piece, a heat-insulating cavity is arranged between the upper heat-insulating layer and the lower heat-insulating layer, and the heat-insulating cavity is communicated with the sound-absorbing cotton piece. A plurality of supporting columns are arranged in the heat insulation cavity, the upper ends of the supporting columns are fixed to the upper heat insulation layer, and the lower ends of the supporting columns are fixed to the lower heat insulation layer. The utility model provides a sound-absorbing cotton piece which is used for an automobile panoramic ceiling and is fir