Heat preservation box

The utility model relates to the technical field of packaging, in particular to a heat preservation box, which is characterized in that a box body is formed by folding cut-parts, and the cut-parts are provided with creases; the front end piece and the rear end piece are located at the front end and the rear end of the bottom piece, the left side piece and the right side piece are located on the left side and the right side of the bottom piece, the left cover piece is connected to the left side of the left side piece, the right cover piece is connected to the right side of the right side piece, and the folding pieces are arranged at the corners of the end pieces and the side pieces respectively. The folding sheet is provided with a folding mark; when the cutting piece is folded, the front end piece, the rear end piece, the left side piece and the right side piece are all folded upwards to form a containing cavity with an upward opening with the bottom piece, the folding piece is folded along the folding mark,