The invention discloses a skin wound closure device capable of promoting healing of a skin wound, which has a characteristic of randomly adjusting wound suturing force. The skin wound closure device comprises a supporting structure arranged on two sides of the skin wound, wherein at least one locking device is arranged above the supporting structure; the locking device comprises a locking strip and a lock catch arranged on the supporting structure; the locking strip is movably connected in the lock catch; and the lock catch is provided with a retaining member which can tightly lock or looselyfit the locking strip in the lock catch. Because of the retaining member, a doctor can make the locking strip be in loose fit in the lock catch by controlling the retaining member, can randomly move the supporting structure and the locking device in a direction close to the skin wound or in a direction keeping away from the skin wound, and tightly lock the locking strip in the lock catch through the retaining member after moving so as to fulfill the aim of randomly adjusting the skin wound suturing force. The skin would closure device is suitable for popularization and application in healing treatments of skin wounds.