A negative-pressure tension-relief suture device for a skin wound, comprises: a negative-pressure support (1)； a sealing membrane (2)； and deformable members (3). The deformable members (3) are disposed at two sides of the negative-pressure support (1). An air void is formed on the negative-pressure support (1). The sealing membrane (2) covers the deformable members (3) to form a closed space. The negative-pressure support (1) communicates an interior of the closed space with the outside. The negative-pressure tension-relief suture device for a skin wound discharges tissue fluid from a skin wound while relieving tension, thereby reducing negative influence of tension on the skin wound, and automatically causing alignment of edges of the skin wound.
