The invention relates to a self-lubricating structure on the surface of a cutting tool, and the cutting tool can be a medical surgical tool, a cutting tool, or a living knife. The capillary force of the groove structure is used to guide the directional transport of the liquid and form a liquid film, so as to wet the blade surface, achieve lubrication and cooling, and reduce adhesion. The trench structures include, but are not limited to, wedge-shaped trenches, trapezoidal trenches, dovetail trenches, tapered trenches, and height gradient trenches. The invention is a self-lubricating structure on the surface of the cutter, which utilizes the capillary force in the groove to guide the directional transport of liquid, and forms a liquid film, realizes the sustainable self-lubrication of the surface of the cutter, achieves lubrication and anti-sticking, and reduces tissue during the operation. Adhesion, improve the durability of cutting tools, and facilitate the use of tools for daily use.