Based on the locomotive energy consumption data and state power statistic reports,we quantitatively analyzed the locomotive energy consumption,CO₂ emission and its ecological footprint before and after electrification reconstruction of the Guangzhou-Meizhou-Shantou railway.Before the electrification reconstruction,the diesel locomotive tractions would annually consume 17.4 kiloton diesel oil and produce 55.0 kiloton CO₂ emission,the total ecological footprint of diesel oil consumed were 12.7 kilo-hectare forest,and the averaged ecological footprint were 0.018 hectare forest per 10 kiloton-km.After the electrification reconstruction,the electric locomotive tractions would annually consume 1.05×10⁸ kw·h power and indirectly produce 84.5 kiloton CO₂ emission in thermal power plants,the total indirectly induced ecological footprint were 19.6 kilo-hectare forest for thermal power,36.37 hectare arable land for hydropower,and the averaged ecological footprint were 0.021 hectare forest and 3.91×10^-5 hectare arable land per 10 kiloton-km.