The invention belongs to the technical field of syringes, in particular suitable for a
drug injection mode for animals, and discloses a pre-filled high-temperature sterilization
syringe. The pre-filled high-temperature sterilization
syringe comprises a tube cap, a needle tube, a push rod and a
piston, wherein the part, near the
handle end of the needle tube, of the needle tube is provided with a stop ring, and the front end of the needle tube is provided with an external thread; the tube cap is provided with an internal thread, and the tube cap and the needle tube are assembled through rotation of the threads; the outer
diameter of the push rod is matched with the inner
diameter of a
handle, and the outer
diameter of the
piston and the inner diameter of the needle tube are in an
interference fit for sealing; the stop ring is welded to the part, near the
handle end of the needle tube, of the needle tube, and during
assembly, the push rod runs through the inner hole of the handle and assembled with the
piston so as to form a locking structure after
assembly. According to the pre-filled high-temperature sterilization
syringe, a filling
machine is used to inject a certain amount of
drug liquid through the top of the needle tube of the syringe, the tube cap and the needle tube are assembled through rotation of the threads so that sealing and locking can be achieved, and the syringe is delivered into a sterilization chamber for
steam sterilization at a high temperature of 121 DEG C for 30 minutes.