Pen blood drawing needle, it is the disposable straight vein blood collection needle which be used in conjunction with vacuum blood collection tube and needle holder. The structure is through the needle tube, both ends have sharp cutting edges; The middle and lower sections of the needle tube are fixed on the needle base, the front end is called a venous puncture needle, the back end is called a blood collecting needle, the surface of the blood collecting needle has a blood blocking sleeve, and the needle tube has a protective sleeve at both ends. This product is made of medical polymer material, sterilized by ethylene oxide, non-toxic, sterile and pyrogen free.