Blood taking needle

The utility model discloses a blood taking needle which mainly comprises a shell, a pushing base, a needle base, a pressure accumulative elastic return part and a safety switch component; the shell is provided with an inner wall, a containing space, a needle outlet and an inserting set end, and a through convex ring edge is formed in the shell, and the through convex ring edge and the inner wall form a demising groove which is provided with a cone-expanding inclined end surface and is used for releasing; the pushing base is assembled in the containing space of the shell in a sliding state, and comprises a control end head and a bar section which is provided with an axial groove chamber for leading the bar section to form two elastic release pieces and be accommodated inside the demising groove for releasing; and a propping inclined edge is formed at the bottom end of the elastic release piece, and the propping inclined edge and the cone-expanding inclined end surface of the release groove for releasing form a