Speaking for ancient residential architecture in northwest China, the finely carved and distinctive architectural sparrow brace in Qingcheng Ancient Town vividly and intuitively demonstrated the historical changes of the Ferry Crossing of the Yellow River. This paper explored the 3D digital modeling methods of different types of sparrow brace. Besides, on the strength of referring to the data, photos and online literature obtained in the field, "3ds Max" modeling platform and "Unity 3D" interactive platform were used to digitally restore the sparrow brace in a realistic and detailed way. The project will find a new path for better digital preservation and revitalization of ancient buildings, and expand the horizon of innovative inheritance of traditional residential architecture.