Polishing device for machining overturning driving shaft of precision instrument

The utility model discloses a polishing device for machining a turnover driving shaft of a precision instrument, which belongs to the technical field of machining and comprises a fixing plate, the upper surface of the fixing plate is fixedly connected with a fixing frame, the bottom surface of the fixing plate is fixedly connected with two supporting legs, and the upper surfaces of the two supporting legs are jointly and fixedly connected with a water storage tank. A sliding groove is formed in the upper surface of the fixing plate, a sliding block is slidably connected into the sliding groove, a polishing unit is fixedly connected to the upper surface of the sliding block, and a clamping tool is fixedly connected to the right side face of the fixing frame. The air suction hood is arranged in the water storage tank and matched with the telescopic pipe, the effect of discharging dust into the water storage tank is achieved, the effect that the telescopic pipe can be extended and retracted when the air suction