Cyst display pressure-preserving syringe for epidural space puncture

The utility model provides a cyst indicating pressure-preserving injector for epidural space puncturing, which is composed of an injector body and a push rod, wherein, the front bottom of the injector body is provided with a communicating pipe; the outer side of the communicating pipe is connected with a cyst; the rear end part of the injector body is provided with a positioning mechanism of the push rod. The positioning mechanism of the push rod is provided with a rack type positioning structure or a pressing cone type positioning structure or a tong type positioning structure; the outer side of the cyst is provided with a cyst cover which is connected with the communicating pipe.