Disclosed is a safety insulin needle, comprising: a needle stand； a needle tube fitting base inside the needle stand； an insulin pen puncture needle and an insulin injection needle provided respectively at an upper part and a lower part of the needle tube fitting base； a self-locking holder provided at the other end of the needle stand, wherein one end of the self-locking holder is sleeved in the other end of the needle stand； a push cylinder inside the self-locking holder, wherein one end of the push cylinder is located within a cavity of the needle stand and penetrates through the needle tube fitting base to be located within the fitting part, and the other end of the push cylinder is pressed against a self-locking flap on the wall of a cavity within the self-locking holder； a needle safeguard having one end connected to an opening at the other end of the self-locking holder, wherein the other end of the needle safeguard suspends and the needle safeguard is connected to the cavity within the needle stand by a spring. A built-in safety injection needle structure is used, the insulin syringe needle is sleeved by the elastic contractible safeguard, and displacement of the safeguard is restricted by a self-locking mechanism. When the insulin pen is rotated into the needle stand, the self-locking mechanism opens automatically, and the safeguard freely displaces up and down to allow normal injection of insulin.La présente invention concerne une aiguille d'insuline de sécurité, comprenant : un support d'aiguille； une base de raccordement de tube d'aiguille à l'intérieur du support d'aiguille； une aiguille de ponction de stylo à insuline et une aiguille d'injection d'insuline disposées respectivement au niveau d'une partie supérieure et d'une partie inférieure de la base de raccordement de tube d'aiguille； un support autobloquant disposé à l'autre extrémité du support d'aiguille, une extrémité du support autobloquant étant emmanchée dans l'autre extrémité du support d'aig
