Arc-shaped warmer with warm-keeping outer layer

The utility model discloses an arc-shaped warmer with a warm-keeping outer layer. An inner cavity with an opening in the upper end is formed in the base. The lower ends of the two rails capable of stretching up and down are fixed on two sides in the inner cavity; a heat preservation cover covering an opening in the upper end of the inner cavity is arranged between the upper ends of the two rails.A plurality of sheet-shaped heaters are arranged between the two rails located on the lower side of the heat preservation cover, rotating shaft sets for driving the sheet-shaped heaters to be flatly laid or erected are arranged on the two sides of the sheet-shaped heaters and evenly distributed on the two rails capable of stretching out and drawing back vertically, a heat preservation layer is arranged in an inner cavity of the base, and the rotating shaft sets rotate back and forth by 90 degrees on the rails. The electric heater has the advantages that the plurality of sheet-shaped heaters are accommodated by rotatin