The invention relates to the technical field of injectors, and discloses an
anesthetic dosage controllable
injector which comprises a
barrel, a
plunger is slidably mounted in the
barrel, two symmetrically arranged convex edges are fixedly mounted at the top end of the outer circle face of the
plunger, and dosage scales are arranged on the
barrel. The sleeve plate and the push plate move synchronously, at the moment, the position of the limiting plate on the barrel is adjusted, the limiting plate can accurately limit movement of the sleeve plate, then the injection dosage is controlled, before injection every time, the locking
assembly is adjusted to be in an unlocking state, the push plate can move independently, and therefore a small part of
anesthetic is squeezed out to be used for exhausting air, and when the push plate abuts against the sleeve plate, the injection dosage is controlled. When the
anesthetic is injected, the anesthetic stops moving, which means that the air is completely exhausted, so that the
volume change of the anesthetic does not need to be observed all the time when the
dose injection is controlled, and the operation process of exhausting the air in the anesthetic in the injection interval is greatly simplified.