The invention discloses a disposable sterile retraction safety blood sampling needle which consists of an end cover, a protective sleeve, a needle guard, a needle, a needle bed, a core rod, an outer sleeve, a piston, a sheath and a blood sampling needle. The piston is arranged in a clamping groove of the core rod the outer sleeve is sleeved on the core rod and the piston the piston and the outer sleeve are in interference fit inner holes of the needle, the needle bed, the core rod and the blood sampling needle are communicated the core rod and the outer sleeve are made of transparent materials the restore health is judged by blood flowing in a passage in the core rod and after blood sampling is completed, medical personnel presses a blood sampling position of the blood sampling needle with one hand, presses the outer sleeve with a thumb of the other hand and pulls the needle guard to move back with other fingers of the other hand, so that a snap ring of the core rod enters a slot to lock the movement of the core rod relative to the outer sleeve and the blood sampling needle is hidden in a cylinder of the outer sleeve, and thus, the aim of safety is fulfilled.
