A one-piece stent implanter comprises a front handle and a rear handle； the front end of the front handle is provided with an outer pipe whose top is flexibly connected with a cautery tip, the outer pipe is internally provided with a middle pipe and a stent； the rear handle includes a stainless steel pipe for supporting and an inner pipe positioned in the stainless steel pipe； one end of the stent is close to the cautery tip, with a certain gap kept； when the front handle is retreated along the stainless steel pipe, the outer pipe simultaneously retreats and separates from the cautery tip, positions of the middle pipe and the rear handle remain unchanged, and the stent is automatically released.
