A main body of the suture threading device is the suture threading device, and a protruding structure is arranged on the upper surface of a lower clamp portion of a suture clamping clamp of the suturethreading device. And when the wire clamp is clamped, the convex structure is in surface contact with the upper clamp part. Compared with the prior art, the wire clamping pliers have the advantages that when the wire clamping pliers are in a clamping state, the farther the lower pliers part and the upper pliers part are away from the front end, the smaller the gap between the lower pliers part and the upper pliers part is, the firmer the wire clamping is, and the firmer the wire grabbing effect is achieved by adjusting the position of the wire hooking structure backwards; and 2, the upper clamp part of the wire clamp is provided with the hook which is bent downwards, and the inner contour of the hook is correspondingly matched with the contour of the front end of the limiting rod, so thatthe lower clamp part and the upper clamp part cannot be misplaced left and right when the wire clamp is in a clamping state. 3, a water injection pipe is added, water flows out from a water outlet after water is injected into the water injection pipe and finally flows out from the front end of the puncture needle, and the flowing-out water is used for clearing an operation area to ensure a clearoperation field.