Water-absorbing expansion bag

The utility model relates to the technical field of safety protection articles. The utility model relates to a bag, in particular to a water-swelling bag. Expansion bag comprising an expansion bag body, wherein the expansion bag body is sewn into a bag shape by linen; the interior of the sewed linen is filled with water-absorbent resin; a connecting strip is sewed at one end of the linen; a plurality of inserting holes are formed in the top surface of the connecting strip; a clamping strip is sewn at the other end of the linen, a plurality of inserting columns are arranged on the bottom face of the clamping strip, a plurality of supporting strips are connected to the inner side of the linen, a plurality of through holes are formed in one sides of the supporting strips and sewn with the linen through needles and threads, and opposite supporting strips are arranged at the centers of the linen and located opposite to the supporting strips at the two side ends of the linen. The flood-proofbarrier is woven by line