In view of the status of section steel handling and cutting management in a shipyard, the parts requirements based on the section Detailed Assembly Procedure (DAP) are analyzed, the parts processing series division principle based on the later lane production procedure requirements is explored, and the material trepanning design of parts lane cutting and section steel handling is made. The engineering application shows that the design can effectively improve the parts sorting and handling efficiency, shorten the parts storage cycle, improve the site utilization rate, and provide strong support for the lean management of shipyard section steel.