A secure vein puncture needle comprises a jacket (0), a needle pipe (1), a needle base (2), a flexible pipe (3), a spring (4), a shielding casing pipe (5), and a dividing cut-off clamp (6). The needle pipe (1) is adhered into a front end hole (2b) of the needle base (2). A convex ridge (2a) at a side wall of the needle base (2) is inserted into a longitude trench (5c) of a front segment of an inner cavity of the shielding casing pipe (5), so as to keep directions of a puncture needle tip (1a) and a handle (5b) consistent. The shielding casing pipe (5) sleeves the needle pipe (1), the needle base (2) and the flexible pipe (3). The spring (4) is compressed into a space between the shielding casing pipe (5) and a front end of the needle base (2). An end of the shielding casing pipe (5) is adhered to the flexible pipe (3) in a high-frequency heat sealing manner. The dividing cut-off clamp (6) sleeves the end of the shielding casing pipe (5). The cut-off clamp (6) is inserted into an open window (5d) of the shielding casing pipe (5). A lower segment of a pipe wall of the shielding casing pipe (5) is thickened to form a narrowed pipe cavity (5f), thereby limiting the convex ridge at the side wall. In use, the dividing cut-off clamp (6) is pressed to divide a thin side tape (5e) of the shielding casing pipe (5), so that the casing pipe (5) moves forwards under the action of the spring (4) to completely cover the puncture needle, and meanwhile, the flexible pipe (3) is closed by the cut-off clamp (6), thereby eliminating the risk of needle-stick injury and avoiding the overflow of blood, drug liquids, and body fluids in the flexible pipe (3).La présente invention concerne une aiguille sécurisée pour ponction veineuse qui comprend une gaine (0), un canal daiguille (1), une base daiguille (2), un canal flexible (3), un ressort (4), un canal formant gaine de protection (5), et une pince de coupure (6). Le canal daiguille (1) est collé dans un trou dextrémité avant (2b) de la b
