The work aims to take the dragon pattern gown in stone blue weaved golden satin colorful-cloud embroidery in the Qing Dynasty as the research object to digitally reconstruct the costume relics in three dimensions by CL0 3D software combined with the digital virtual technology. AI software, Photoshop software and Fuyi CAD software are adopted to analyze the style structure, recover the sample pattern and restore the pattern. The proportional method is proposed and used to measure the size of individual patterns, and draw and restore the original patterns according to the proportional size of the combined patterns in the original relics, providing ideas and methods for the digital restoration of costume patterns and adding new strength to the preservation and transmission of costume relics.