Syringe needle head and use method of syringe

The invention provides a syringe needle head and a use method of a syringe. The syringe needle head comprises a needle stalk front section and a needle stalk tail section which are mutually separated; the first end of the needle stalk front section is a needle head; the first end of the needle stalk tail section is connected with a pintle; the syringe needle head also comprises a transparent soft catheter; one end of the soft catheter is butted with the second end of the needle stalk front section; the other end of the soft catheter is butted with the second end of the needle stalk tail section; inner diameters of two ends of the soft catheter are not greater than the outer diameter of the needle stalk. When the syringe needle head and the use method of the syringe provided by the embodiment of the invention are adopted for a mouse tail vein injection experiment, if needle insertion is successful, a blood return phenomenon can be found by the transparent soft catheter, so that the reliability of the mouse tai