This paper presents the application of multi-objective optimization methods for Network expansion planning. According to the electricity liberalization in fiscal year 2016, a suitable distribution method for both supply and demand selection is desired. Therefore, the distribution network expansion planning was studied in this research. In recent research, Controlled NSGA-Ⅱmethod regarding to the linkage distinction method using count box was being considered. This study proposes the same idea with an improvement to the method. It is also expected for an outcome which preserves the individual that supposed to be destroyed along the calculation process and also, necessary for wide solution.