A surgical stapler and a stapling method using the surgical stapler. A head portion (20) comprises a staple barrel (21) connected at an operation portion (30), a staple pushing column (22) disposed in the stable barrel (21) and capable of being pushed by the operation portion (30), a staple cartridge (23) disposed at an end portion of the staple pushing column (22) and used for accommodating staples, and a cutter (24) supported by the staple pushing column (22) and capable of being pushed by the staple pushing column. An end surface of the staple barrel (21) close to the staple cartridge (23), an end surface of the staple pushing column (22) close to the staple cartridge (23), an end surface of the staple cartridge (23) used for accommodating staples, and a blade end surface of the cutter (24) are elliptic rings fitting each other and perpendicular to the axis a staple anvil (10) comprises an anvil block (14) and a connection shaft lever (11). A joint surface of the anvil block (14) is an elliptic ring fitting the end surface of the staple cartridge (23) used for accommodating staples. The joint surface of the anvil block (14) is provided with staple positions corresponding to staple holes on the staple cartridge (23). The anastomosis is elliptic anastomosis, so that the anastomotic area is increased, the anastomotic stenosis is less likely to occur, the anastomotic tissues are increased, and the possibility of anastomotic leakage is reduced.La présente invention concerne une agrafeuse chirurgicale et un procédé dagrafage utilisant lagrafeuse chirurgicale. Une partie tête (20) comprend un cylindre dagrafes (21) raccordé au niveau dune partie dactionnement (30), une colonne de poussée dagrafes (22) disposée dans le cylindre dagrafes (21) et pouvant être poussée par la partie dactionnement (30), une cartouche dagrafes (23) disposée à une partie extrémité de la colonne de poussée dagrafes (22) et utilisée pour recevoir des agrafes, et un élément de coupe (24) supporté
