The invention relates to an instrument facilitating suture in a laparoscopic surgery. The instrument comprises an arc-shaped outer tube, an arc-shaped inner tube, a suture needle, a suture line, a handle, a crack, an arc-shaped bent rod and a joint, wherein the arc-shaped outer tube sleeves the arc-shaped inner tube, the joint is arranged at one end of the arc-shaped outer tube, one end of the arc-shaped inner tube is connected with the handle, the crack is axially arranged on the outer wall of the arc-shaped inner tube, the suture needle is inserted into the arc-shaped inner tube, the tail of the suture needle is connected with the suture line, the suture line is placed in the crack, the arc-shaped bent rod penetrates the arc-shaped inner tube, and the end of the arc-shaped bent rod is provided with an inclined surface abutted to the tail of the suture needle. The instrument is simple in structure, pulling movement of the suture line is realized by the aid of the crack on the arc-shaped inner tube, the suture needle is fixed by the arc-shaped bent rod, a doctor can conveniently, rapidly and accurately find suture positions during suture, the suture needle horizontally enters in suture, suture accuracy is increased, and surgical efficiency is improved.