The invention discloses a skin wound closure device capable of promoting skin wound healing and characterized by being capable of randomly adjusting stitching force for a wound. The skin wound closure device includes a support structure respectively arranged at both sides of a skin wound, at least one locking device is arranged above the support structure, the locking device includes a locking bar and a locking buckle arranged on the support structure, the locking bar is movably connected within the locking buckle, and a locking member is arranged on the locking buckle and can lock or loosely fit the locking bar in the locking buckle. Arrangement of the locking member allows doctors to loosely fit the locking bar in the locking buckle by controlling the locking member, randomly move the support structure and the locking device towards the direction close to the skin wound or the direction away from the skin wound, and lock the locking bar in the locking buckle by the locking member after proper movement, thus achieving the purpose of randomly adjusting the stitching force for the skin wound. The skin wound closure device is suitable for widespread application to healing treatment of skin wounds.