Abstract: A compression bag is provided. The compression bag includes a bag body, a sealing strip, and a one-way valve, where two sides of the bag body are respectively folded inwardly to form folding portions; portions between the folding portions respectively form bag sheets; two ends of the bag body are sealed; an edge of at least one end of the bag body is thermocompression-sealed; an elongated hole and a valve hole are formed in the bag body; the sealing strip is fixedly provided in the elongated hole; and the one-way valve is fixedly provided in the valve hole, and allows unidirectional flow from inside to outside. At two sides of the compression bag, the folding portions for changing a volume through expansion and contraction and the bag sheets connected between the folding portions are all obtained by folding different parts of the bag body.

Abstract: A compression bag is provided. The compression bag includes a bag body, a sealing strip, and a one-way valve, where two sides of the bag body are respectively folded inwardly to form folding portions; portions between the folding portions respectively form bag sheets; two ends of the bag body are sealed; an edge of at least one end of the bag body is thermocompression-sealed; an elongated hole and a valve hole are formed in the bag body; the sealing strip is fixedly provided in the elongated hole; and the one-way valve is fixedly provided in the valve hole, and allows unidirectional flow from inside to outside. At two sides of the compression bag, the folding portions for changing a volume through expansion and contraction and the bag sheets connected between the folding portions are all obtained by folding different parts of the bag body.