Three-dimensional brewing bag

The utility model discloses a three-dimensional brewing bag which comprises a bag bottom, a bag barrel, a bag opening and a sealing accessory at the bag opening. The bag barrel is of a barrel-shaped structure or a tubular structure formed by filtering materials, seams between the filtering materials are spliced in a seamless, single-seam or multi-seam splicing mode, and the shape of the bag barrel can be changed according to the change of the shapes of the two ends; the bag bottom is connected with the barrel wall at one end of the bag barrel to form a barrel shape with a wall and a bottom; the bag opening is connected with the other end of the bag barrel, the bag opening serves as a bag opening in the opened state and can contain articles, and the bag opening can be tightened or closed when the bag opening is closed, so that the articles in the bag barrel cannot leak out. A three-dimensional bag structure is adopted, the space in the bag is large, and whole tea leaves can be contained when the tea leaves are