The process flow of strapping in place (SIP) was established and discussed by an example of packaging case design of large air liquefaction equipment. The standardization and normalization of strapping in place packaging technology was discussed. The structure of wooden case and its baseboard was designed by using SolidWorks software. Mechanical analysis of critical components was carried out by using ABAQUS finite element software according to the properties of materials. The baseboard's structure was improved and a whole suite of design thoughts and operational requirement of SIP was put forward, which can be used in practice.