Liquid nitrogen freezing anti-injury device for dermatology department

The utility model discloses a liquid nitrogen freezing anti-injury device for the dermatology department. The liquid nitrogen freezing anti-injury device comprises a tank body unit, a lifting unit vertically inserted into the tank body unit and a driving unit installed on the upper portion of the tank body unit and connected with the lifting unit in a threaded fit mode. Wherein the driving unit is used for driving the lifting unit to lift up and down in the length direction of the tank body unit. The lifting neck pipe is driven to move in the tank body by utilizing the principle of a screw sleeve and a lead screw, namely the worm is matched with the worm gear, so that the heat insulation rod in the lifting neck pipe and the lifting cylinder are driven to ascend together, and then the lifting cylinder is switched to a proper position by rotating the rotating disc; the lifting cylinder filled with liquid nitrogen is lifted to the discharge port through the insulating rod to be taken out, in this way, no redunda