Abstract：
This article starts with the basic concept of pre-assembly of steel structures, and comprehensively introduces the principle, main content, application methods, technical preparation, acceptance criteria, scope of application and successful cases of virtual pre-assembly. The preliminary suggestions for the selection of pre-assembly and virtual pre-assembly methods are given. Suggestions for supplementing draft standard for approval for steel structure construction are presented. Preliminary analysis of the advantages and disadvantages of entitative pre-assembly and virtual pre-assembly is given. Pre-assembly is still lacking, and looks forward to the direction of future research and development.
