Electricity pollution is given close attention. For the marginal power generated and carbon emissions caused impact on unit electricity of the power consumption side, through setting up evolution scenario of power generation technology, power loss rate, power plant consumption rate and so on and forth in different carbon control scenarios, it calculates the trend of marginal carbon evolutionary emissions of coal energy chain that caused by unit power consumption. Comparing marginal carbon emissions results of different carbon constrained scenarios, it founds that taking use of electric control technology in low carbon scenario or enhanced low carbon scenario is inevitable choice to low carbon development of coal power industry.