Hole machining method based on reverse virtual size as reference and special drilling mold

The invention provides a hole machining method based on a reverse virtual size as the reference and a special drilling mold. The hole machining method comprises the following steps that through a design reference surface (sliding block part surface) of a machining hole of a numerical control machine tool and other characterizes, a process reference hole is machined according to the same positioning reference reverse face, after a patch is cut off, the process reference hole is used as the first reference in the horizontal direction, two large-hole sizes are used as the second positioning reference, and the design reference face is used as the reference to fix the drilling mold in the vertical direction for drilling; meanwhile, to avoid over-positioning, the contact face of each fixing pinof the second positioning reference adopts a diamond-shaped structure; and for the method, the special drilling mold is designed and is composed of a bottom plate (1), the diamond structure positioning pins (2), a drilling mo