Abstract: Based on the annual production data collected by Statistic Center of Chinese Railway Ministry, we calculated the energy saving, and the direct emission reductions of CO₂, soot, SO₂, CO, NO_X and CnHm of electrified railways, and analyzed their dynamic characteristics during 1975-2007. The results show that during the past 33 years, the annual mean values of energy saving and the direct reductions of CO₂, soot, SO₂, CO, NO_X and CnHm emissions were 1.230 Mt ce (coal equivalent), 4.267 Mt, 20.5 kt, 3.0 kt, 9.6 kt, 67.9 kt and 6.9 kt, respectively. The average growth rates of energy saving and direct reductions of CO₂, soot, SO₂, CO, NO_X and CnHm emissions were 139 kt ce, 483 kt, 2.3 kt, 0.34 kt, 1.1 kt, 7.7 kt and 0.78 kt per year, respectively. The electrified railways played an important role in decreasing the energy consumption and air pollutants emissions of Chinese railway system in the past 33 years. The study results could provide some reference knowledge for future reduction of energy consumption and waste gases emission in Chinese railway transportation.