The invention discloses a drill jig for a magnetic yoke inclined hole. The drill jig comprises a connecting plate, a transition plate and a drill plate; the transition plate is horizontally arranged,the connecting plate is vertically arranged above the transition plate, and the drilling template is vertically arranged below the transition plate; a through hole used for being connected with a mainshaft of a numerical control boring machine tool is formed in the connecting plate; and a plurality of inclined holes matched with the magnetic yoke inclined holes are formed in the drill template from bottom to top. The invention further discloses a machining method of the magnetic yoke inclined hole, so that the production efficiency can be improved, the used average time of the drill jig is smaller than the used time of the whole magnetic yoke drilling template, the operation is easy, the processing precision is high, and the structure is reasonable.