The invention discloses a drilling tool and method for a hydraulic turbine upper fixed wearing ring pin hole. The drilling tool for the hydraulic turbine upper fixed wearing ring pin hole comprises anupper ring body with a certain height and a lower ring body with a certain height. The upper ring body is positioned above the lower ring body, and the upper ring body and the lower ring body are concentric. The inner diameters of the upper ring body and the lower ring body are the same as the inner diameter of an upper fixed wearing ring, and the outer diameter of the upper ring body is smallerthan the outer diameter of the lower ring body. The outer diameter of the lower ring body is larger than the outer diameter of a circular ring on the upper end portion of the upper fixed wearing ring.The outer diameter circumferential edge of the bottom of the lower ring body extends a certain length of edge in the height direction of the upper ring body and the lower ring body. The drilling toolis manufactured according to the upper fixed wearing ring. The roundness of the upper fixed wearing ring is ensured by taking the tool as an intermediate medium, a pin hole on an old upper fixed wearing ring can accurately be copied to upper fixed leakage stop ring spare parts, the drilling accuracy of the pin holes of an upper fixed wearing ring spare part is greatly improved, the risk of scrapping the wearing spare part is effectively reduced, and the drilling tool and method for the hydraulic turbine upper fixed wearing ring pin hole have the advantages of simple structure and easy manufacture.