Eversion type stitching instrument

The utility model provides an eversion type stitching instrument which comprises a nail bin mechanism, a nail anvil mechanism, a transmission mechanism, a percussion control mechanism, a nail bin cover, a nail bin seat and a nail anvil seat, a penetrating groove extending in the length direction of an execution mechanism is formed in the nail bin cover, the nail bin seat and the nail anvil seat, and openings are formed in the penetrating groove at the far ends of the nail bin cover, the nail bin seat and the nail anvil seat. Guide grooves extending in the length direction of the executing mechanism are further formed in the positions, on the two sides of the penetrating groove, of the nail bin cover and the nail anvil block; suturing nails in the nail bin mechanism are arranged on the two sides of the penetrating groove and located between the penetrating groove and the guide groove. According to the utility model, the penetration groove is arranged, the broken ends of the anastomosis tissue can be pulled int