Abstract: In order to improve the design quality and efficiency of the modeling process of missile body
structure, modeling process of missile body structure was studied. The structure of missile body
top-down parameters assembly ligand modeling method was presented. Based on UG platform, missile
body structure modeling system was developed, in which the missile body structure modeling, model
rapid change and assembly parameters driving and management as the whole were realized. Used the
typical structure of missile body structure as an example, the feasibility and effectiveness of the method
were verified.

Key words: missile body structure, top-down, parametric assembly, parametric modeling