Abstract: In order to improve the defects in present methods of module partition, complex
network theory is applied in the module partition, and a new method of module partition is
proposed based on community structure algorithm. The network map is constructed according to
the relationship of Structural unit, then the module partition is completed using of GN algorithm.
The method and steps of the proposed method are explained, then, the validity and feasibility of
the proposed method is proven using a case study on automobile engine module. Finally, it
summarizes the main work and mentions the weakness in the research and the prospects of the
future research.

Key words: module partition, complex network theory, community structure, GN algorithm