Thoracocentesis intercostal catheterization device

The utility model discloses a thoracocentesis intercostal catheterization device. The device comprises a needle tube, a piston inserted into the rear end of the needle tube, a puncture needle connected to the front end of the needle tube, and an elastic skin expanding needle, the puncture needle comprises a connecting tube used for being connected with the front end of the needle tube, a first external thread section and a puncture needle head which are sequentially and coaxially connected with the front end of the connecting tube, and a moving section which is in threaded connection with theperiphery of the first external thread section through internal threads and can move in the axial direction of the puncture needle head. The skin expanding needle comprises a second external thread section in threaded connection with the internal thread in the moving section and a skin expanding needle body section in the axial direction, the second external thread section and the skin expanding needle body section are co