Absolute non-interfering precision measuring method facing ultra-large spatial complex curved surface

The invention discloses an absolute non-interfering precision measuring method facing ultra-large spatial complex curved surface. In the invention, an optical project method is utilized to set global control point and measuring point; the directed camera combined control point technology is utilized to realize the initial orientation of the measuring camera under each measuring station; the global control point is utilized to realize the splicing of each measuring point region and the measuring point is utilized to serve as public point to realize the splicing of global control point region. The invention solves the detection problem of the realization of ultra-large spatial curved surface by adopting the close-range photogrammetry method in the case of not utilizing coded marking; and nophysical marking needs to be set on the surface of the detected object, and the surface appearance of the detected object is not slightly interfered.