Under the background of national scientific and technological innovation and high-speed development of digital design and manufacture, the contradiction between advanced digital manufacturing and the traditional metrological assurance mode of "first manufacturing, then testing, and then calibrating for inspection" is increasingly prominent. In this paper, taking the digital metrology guarantee capacity of geometric parameter as an example, by analyzing and comparing the current situation of geometrical metrology guarantee status in aviation digital design and manufacturing projects at home and abroad, it is proposed that in order to ensure the geometric dimension accuracy of the digital manufacturing of products in the whole life cycle of aircraft, the new digital metrology guarantee system should be studied and discussed following the new product geometric specifications, starting from the definition of digital model of products and according to the measurement traceability requirements of key processes and key parameters for digital design and manufacturing collaboration.