Axle hole reference on-site and quick leading out tool and method for visual precision measuring

The invention belongs to the technical field of geometric sense precision measuring and particularly relates to an axle hole reference on-site and quick leading out tool and method for visual precision measuring, aiming at providing a leading out tool and a leading out method. The tool comprises an axle reference leading out tool and a hole reference leading out tool. The method comprises following five steps: establishing a tool coordinate system, marking three-dimensional coordinate values of a center of a directional reflectance sphere on the tool coordinate system, mounting the axle hole reference on-site and quick leading out tool, measuring, and data processing. By use of the leading out tool and the method based on the tool, a measurement coordinate system and a work-piece coordinate system can be quickly established on-site when measuring a large mechanical part using a visual precision measuring system, wherein the work-piece coordinate system is defined based on a reference point which is an intersection point of an axis of an axle or a hole and a reference plane.