Self-expanding flood-control moisture-absorbing and water-absorbing bag

The utility model discloses a self-expanding flood prevention moisture absorption and water absorption bag which comprises a bag body, a partition body, a one-way water molecule film inner bag, a chinlon woven bag, water absorption filler and sand particle filler. A separation body is arranged in the bag body and divides the bag body into a cavity I and a cavity II; the one-way water molecule film inner bag is filled with water absorption filler. The one-way water molecule film inner bag is arranged in the cavity I; the chinlon woven bag is filled with a sand grain filler; the chinlon woven bag is arranged in the cavity II; and an opening and closing accessory is arranged at a bag opening of the bag body. The bag body is provided with the two cavities which are respectively provided with the one-way water molecule film inner bag with the water absorption filler and the chinlon woven bag with the gravel filler, so that the flood control bag is increased by a certain weight, and the flood control bag is prevent