New Coal Chemical Industry is developing vigorously recently, which not only leads to a significant carbon emission growth from coal conversion, but also from the upstream and downstream industrial chain. In order to comprehensively figure out the potential influence of New Coal Chemical Industry to climate change, Life Cycle Assessment method is used to calculate the current and potential CO2 emission of coal to olefins (CTO), direct coal to liquid (CTL), indirect CTL, and coal to synthetic natural gas (SNG). The result shows that, the CO2eq emission in the middle term will be 10 times as much as the present value, and the emission in the long term emission will be 21 times as much as the present value. The New Coal Chemical Industry is overheating and it will bring significant pressure to carbon emission reduction goal of China. Coal to SNG contributes the most to carbon emissions growth, followed by CTO and indirect CTL. 54 %–63 % of CO2 comes from the conversion process which has high purity and could be significantly decreased by CCUS. The CO2 emission from upstream and downstream industrial chain accounts for about 37 %–46 %, in which the indirection emission due to electricity usage accounts for 7 %–15 %, which could be reduced through the promotion of the supercritical and ultra-supercritical power generation technology, and the high and ultrahigh pressure transmission technology.