Modularization design has advantages such as shortening the period of product development

improving product performance. Removable design expands green design idea into the full life cycle of products. This paper integrates modular design method and the removable design idea

and the removable design rules of modularity is proposed. Taking removable degrees

internal polymerization degree

external coupling degree as optimization objective

the module partition is done. According to the problem that ICA can’t get uniform Pareto optimal set when solving module partition problem

an improved ICA is proposed

which deletes non dominated antibody from where antibody is crowded. This method get a better Pareto optimal set. Then taking module division of the aircraft landing gear by the improved ICA as an example

the result shows this method is feasible and applicability.