Volumetric flask ultrasonic cleaning fixing device

The utility model discloses a volumetric flask ultrasonic cleaning fixing device which comprises a bottom plate and a pressing plate, guide rods are arranged on the two sides of the upper surface of the bottom plate, the pressing plate is located above the bottom plate, guide rod mounting holes are formed in the two sides of the upper surface of the pressing plate, and the guide rods penetrate through the guide rod mounting holes and are in sliding fit with the guide rods. A pressing plate locking mechanism for fastening the pressing plate and the guide rod into a whole is arranged on the pressing plate, an elastic limiting mechanism is further arranged on the pressing plate, and the elastic limiting mechanism is used for allowing a bottleneck of a fixed volumetric flask 5 to penetrate through and pressing a flask body of the volumetric flask so as to limit horizontal shaking of the bottleneck of the volumetric flask and vertical jumping of the volumetric flask; and a positioning spring is arranged on the gui