Accurate arterial blood sampling device

The utility model relates to a blood sampling device, in particular to an accurate artery blood sampling device, which comprises a pen cap and a pen container which are movably connected, the pen container comprises a front pen container and a rear pen container which are movably connected, a piezoelectric sensor induction column is horizontally fixed at the lower end in the front pen container, and a horizontal sliding rail is arranged at the upper part in the front pen container. A piezoelectric sensor induction column is arranged on the horizontal sliding rail, a rack is arranged at the upper end of the piezoelectric sensor induction column, a long-strip-shaped groove is formed in the outer top wall of the front pen container, and an induction column telescopic control wheel matched with the rack is arranged in the long-strip-shaped groove; a control chip, a needle ejection mechanism, a display screen and a switch are arranged in the rear pen container, the needle ejection mechanism is fixed in the rear pe