The invention relates to a stapling tool. The stapling tool comprises a bottom plate and a plurality of stapling teeth, wherein the bottom plate comprises a first side edge and a second side edge; a plurality of first grooves are formed in the first side edge; a plurality of second grooves are formed in the second side edge; first connection convex parts are arranged in the first grooves; first rotation shafts are arranged at the end parts of the first connection convex parts; second connection convex parts are arranged in the second grooves; second rotation shafts are arranged at the end parts of the second connection convex parts; the stapling teeth comprise first arc-shaped teeth and second arc-shaped teeth; first installation jaws are arranged at one ends of the first arc-shaped teeth; second installation jaws are arranged at one ends of the second arc-shaped teeth; flexible clamping parts are arranged at the other ends of the first arc-shaped teeth; clamping holes are formed in the flexible clamping parts; rigid round-head bulges are arranged at the other ends of the second arc-shaped teeth; mushroom heads are arranged at the top ends of the rigid round-head bulges; and when the first arc-shaped teeth and the second arc-shaped teeth are located at locking positions, the mushroom heads are inserted into the clamping holes.