Abstract: Biased technological progress is significant to economic growth and energy conservation of China. Scholars and policy makers are very concerned about whether carbon emission price can solve negative externalities of corporate emissions. Based on the data of 190 cities in China and above from 2007 to 2016, this paper uses the Malmquist index to estimate the input biased technical change index and its features in the save of energy factor, tests the abatement effect of biased technological progress and carbon emission price. Based the data of 25 pilot carbon emission trading cities, this paper confirms moderating effect of carbon emission price on the abatement effect of biased technological progress. This study finds that: (1) From the input biased technical index, the overall biased technological progress index is bigger than 1 but shows a downward trend of volatility. (2) From the bias/direction of biased technological progress, in the sample cities, the bias/direction of biased technological progress in energy and capital is biased towards energy-saving cities accounted for 53%, the bias/direction of biased technological progress in energy and labor is biased towards energy-saving cities accounted for 46%. (3) From the abatement effect, biased technological progress has significant emission reduction effect. Carbon emission price has not significant emission reduction effect. (4) From the moderating effect, the carbon emission trading price has a significant moderating effect on the emission reduction effect of biased technological progress. This paper provides a theoretical reference for further promoting the construction of the national carbon emission trading market and the government to formulate reasonable emission reduction policies.