Pulmonary nodule positioning puncture needle with external limiting structure

The pulmonary nodule positioning puncture needle with the external limiting structure comprises a puncture needle body, and the puncture needle body comprises a handle, a needle tube arranged on the handle and a push rod installed on the needle tube. The anchoring needle is installed in the needle tube and located at the front end of the push rod, the anchoring line is arranged on the anchoring needle, penetrates through the puncture needle body and penetrates through the other end of the puncture needle body, the limiting mechanism is installed at the tail end of the anchoring line, and the limiting mechanism comprises a flat shell and a limiting stopper which is arranged on the shell and used for clamping the anchoring line and preventing the anchoring line from slipping. Through the arrangement of the limiting mechanism, after the anchoring needle is positioned at the focus of the human body through the puncture needle body, the anchoring line exposed out of the human body is clamped and fixed through the