Hydrogels,　due　to　their　excellent　biochemical　and　mechnical　property,　have　shown　attractive　advantages　in　the　field　of　wound　dressings.　However,　a　comprehensive　review　of　the　functional　hydrogel　as　a　wound　dressing　is　still　lacking.　This　work　first　summarizes　the　skin　wound　healing　process　and　relates　evaluation　parameters　and　then　reviews　the　advanced　functions　of　hydrogel　dressings　such　as　antimicrobial　property,　adhesion　and　hemostasis,　anti-inflammatory　and　anti-oxidation,　substance　delivery,　self-healing,　stimulus　response,　conductivity,　and　the　recently　emerged　wound　monitoring　feature,　and　the　strategies　adopted　to　achieve　these　functions　are　all　classified　and　discussed.　Furthermore,　applications　of　hydrogel　wound　dressing　for　the　treatment　of　different　types　of　wounds　such　as　incisional　wound　and　the　excisional　wound　are　summarized.　Chronic　wounds　are　also　mentioned,　and　the　focus　of　attention　on　infected　wounds,　burn　wounds,　and　diabetic　wounds　is　discussed.　Finally,　the　future　directions　of　hydrogel　wound　dressings　for　wound　healing　are　further　proposed.