The present invention relates to a carbon group antimicrobial agent composition and a preparation method of the carbon group antimicrobial agent composition. More specifically, the present invention relates to a carbon group antimicrobial agent composition comprising carbon group nanoparticles which are surface modified by one or more selected from the group consisting of boric acid, water, an alkoxy group, and a carboxyl group, and a preparation method of the carbon group antimicrobial agent composition, the preparation method comprising: a) a carbon group nanoparticle preparing step of preparing carbon group nanoparticles in which an oxide layer of 0.5 nanometer or less is formed； b) a substitution material mixing step of mixing one or more selected from the group consisting of an aqueous boric acid solution, an aqueous organic solvent solution, an alcohol, and a carboxylic acid with the oxide layer-formed carbon group nanoparticles； and c) an ultrasonic irradiation step of irradiating ultrasonic waves onto a substitution material-mixed mixture prepared through the substitution material mixing step b). The carbon group antimicrobial agent composition and the preparation method of the carbon group antimicrobial agent composition provide an antimicrobial agent composition exhibiting an excellent antibacterial effect, lower production costs and simplify production process by using carbon group nanoparticles having a thin oxide layer formed therein such that it is not necessary to use a dispersant or additional additives, and exhibit excellent coverage for various products such as varieties of electronic goods, clothing, shoes, and the like by lowering the surface tension.개시된 내용은 탄소족 항균제 조성물 및 그 제조방법에 관한 것으로, 더욱 상세하게는 붕산, 물, 알콕시기 및 카르복실기로 이루어진 그룹에서 선택된 하나 이상으로 표면개질된 탄소족 나노입자를 포함하여 이루어지는 탄소족 항균제 조성물 및 a) 0.5 나노미터 이하의 산화층이 형성된 탄소족 나노입자를 제조하는 탄소족 나노입자 제조단계, b) 산화층이 형성된 탄소족 나노입자에 붕산 수용액, 유기용매 수용액, 알코올 및 카르복실산으로 이루어진 그룹에서 선택된 하나 이상을 혼합하는 치환물질혼합단계 및 c) 상기 b) 치환물질혼합단계를 통해 제조
