Korean government is enforcing 'Greenhouse gas target management' in order to achieve Greenhouse gas reduction target. To attain Greenhouse gas reduction target, companies in Korea must establish their GHG inventory system and analysis their GHG emissions characteristics for deduction of mitigation measures. LMDI(Log Mean Divisia Index) decomposition analysis is widely used to understand characteristics of GHG emission and energy consumption. In this paper, the characteristics of GHG emission from the line of railroad in Korea is respectively analyzed in terms of conversion effect, intensity effect, production effect and distance effect. Data of railroad GHG emission from 2000 to 2007 are used. As a result, total effect of railroad's GHG emission is 96,813tCO 2 eq. Production effect (39,865tCO 2 eq) and distance effect (327,923tCO 2 eq) affect increase of railroad GHG emissions while Conversion effect (-158,161tCO 2 eq) and intensity effect (-112,814tCO 2 eq) influence decrease of the emissions.