The digital twin workshop (DTW) uses digital twin technology as the core

which could effectively solve the bottleneck of the physical-cyberspace fusion in workshop. The characteristics of the current complex products assembly process are summarized

the concept of as-built assembly model

as well as the framework of the DTW for complex products assembly including physical entity layer

model data layer

iterative analysis layer

and collaborative service layer

are proposed. The regulating method of assembly process with assembly modified model as the core and the operation mechanism of assembly DTW are studied. On this basis

the contribution of the DTW to the efficiency promotion of the assembly process is analyzed

and a new idea for improving the complex products assembly workshop is provided.