A
safety syringe needle comprises a needle, a
needle holder, a needle protective cover, a spring, and a locking-releasing structure, wherein the needle protective cover, which is sleeved on the
needle holder before and during injection, is moved to the needle after injection and protects the needle, the spring disposed between the
needle holder and the needle protective cover is used for driving the needle protective cover to move from the needle holder to the needle after injection, and the locking-releasing structure disposed between the needle holder and the needle protective cover is used for locking the needle protective cover at the needle holder before and during injection and releasing the needle protective cover after injection. When located at the needle holder, the needle protective cover compresses the spring on the needle holder; and when the needle protective cover is located at the needle, the spring is released. The
safety syringe needle prevents
medical staff from being accidentally punched by the needle during use, prevents reusing of a
syringe / needle, and has the advantages of disposability, safety,
sanitation, convenience in use, and easiness in recycling.