Knotting device for intra-cavity suture line in minimally invasive surgery

The utility model relates to a knotting device for an intra-cavity suture line in minimally invasive surgery. The knotting device comprises an outer sheath (1) and an inner core (2), wherein the outer sheath (1) is a thin-tube body with a through hole (11); the inner core (2) is a solid-core thin-rod body inserted into the through hole (11) of the outer sheath; a first hook (12) is arranged at the front end of the outer sheath (1); the first hook (12) is matched with the front end face of the inner core (2) and is used for clamping the suture line together with the front end face of the inner core (2) when the inner core (2) extends forward; and a second hook (21) capable of hooking the suture line is arranged on the rear part of the front end face of the inner core (2) matched with the outer sheath (1). The knotting device has the advantages of convenience in operating and good knotting effect; by utilizing the knotting device to knot, the operation time is saved and the operation risk is reduced; and the kn