The invention provides a three-dimensional 
assembly process generation method and 
system for an 
aerospace product. The 
system comprises a three-dimensional manufacturing resource 
library building module, a three-dimensional 
assembly process design module, a three-dimensional 
assembly process simulation module and a three-dimensional assembly process release module, the three-dimensional manufacturing resource 
library building module is used for building a three-dimensional manufacturing resource 
library containing product, fixture, tool and auxiliary material information, the three-dimensional assembly 
process design module is used for decomposing process tasks and planning a process according to the built three-dimensional manufacturing resource library to form a process structure tree, the three-dimensional assembly 
process simulation module is used for building a virtual assembly environment and simulating and analyzing the assembly process according to a three-dimensional model, the assembly process and the process structure tree to form a three-dimensional assembly 
animation meeting actual assembly requirements, and the three-dimensional assembly process release module is used for integrating 
process design information and 
simulation information, forming a three-dimensional assembly process file and releasing the three-dimensional assembly process file to an assembly site. Accurate and visual three-dimensional visual means are provided for 
aerospace product assembly, so that the problem of information gaps among three-dimensional 
product design, three-dimensional process design and three-dimensional assembly site implementation in the prior art can be solved.