High-precision damping hinge

The utility model relates to the technical field of hinges, and discloses a high-precision damping hinge which comprises a first connecting plate, a connecting piece and a second connecting plate, a sleeve is arranged on one side of the first connecting plate, the cross section of a cavity of the sleeve is in a water drop shape, the connecting piece comprises a pin rod, a lamination and a coil spring, the pin rod, the lamination and the coil spring are installed in the sleeve, and the pin rod is connected with the second connecting plate. The two ends of the pin rod extend out of the sleeve, the coil spring is located in the small end of a cavity of the sleeve, the pin rod is sleeved with a plurality of laminations, each lamination comprises a hook body and a limiting end, the limiting end is arranged at one end of the hook body and makes contact with the coil spring, the hook body and the limiting end form an integral structure, and a plurality of protruding edges are evenly distributed on the inner side fac