Liquid preparation local automatic injection device

The utility model discloses a liquid preparation local automatic injection device, which relates to the technical field of medical appliances and comprises a shell and a driving device, the driving device is fixed on the shell, the shell is further provided with a containing groove, an injector is placed in the containing groove, and a limiting element is arranged in the containing groove. The limiting element is used for preventing the needle cylinder from moving in the axial direction of the needle cylinder when the injector is embedded into the containing groove, a push rod is slidably connected into the containing groove, the driving device is fixedly connected with the push rod, one side of the push rod is used for making contact with a push handle of the injector, and the driving device can drive the push rod to push the push handle of the injector at a constant speed in the injection direction. The liquid preparation local automatic injection device can achieve automatic injection and is good in inject