The dressing contains mainly hydrocolloid CMC, which is hydrophilic and excellent absorption and exudates management. Hydrocolloid dressing supplies the wound with enough moisture, so that the necrosis tissue of the wound can be hydrated, which improves debridement. Besides, CMC can absorb the extra exudate and toxin to keep reasonable moisture of the wound and improve the tissue development. It can let oxygen exchange, prevent microorganisms from passing the semi-permeable membrane, absorb the jelly formed by the exudates and avoid adhesion between the dressing and the wound. The dressing can be used on operations, burn, abrasion, skin donor sites, chronic wound and healing wound etc. It is much better for bed sore, ulcer of lower limbs and infected ulcer.