Preparation method of high-precision round-corner curvature radius needle tip

The invention aims to disclose a preparation method of a high-precision rounded curvature radius needle tip, compared with the prior art, a method of combining first-stage dynamic corrosion and second-stage static corrosion modification is adopted, the needle tip is preliminarily formed through the first-stage dynamic corrosion, and then the needle tip is formed through the second-stage static corrosion to obtain the high-precision rounded curvature radius needle tip. The second-stage static corrosion voltage is lower than the first-stage corrosion voltage, the reaction time is shorter, the molding of the needle tip is smoother, and the second-stage static corrosion is used for modifying the smoothness and curvature radius of the needle tip; the needle tip for an atomic force microscope probe device, an electron beam emission needle and an ion beam emission device is manufactured through dynamic and static two-stage electrochemical corrosion, the radius of curvature of a fillet at the tip end of the needle ti