It is basic to definite the technological bias in process of carbon dioxide emission reduction of China for making emission reduction policy. Basing on the difference of mechanism of action, the model of effective factors to carbon dioxide emission was established in the paper. Taking the data of emission of 1984-2013 as samples, technological bias in the process of carbon dioxide emission reduction of China was experimentally tested through co-integration technology. The result shows that biases do exist, and technological bias leans to energy production technology rather than energy utilization technology, this is inconsistent with observation in practice. Through analysis, the reason why production technology made greater contribution than utilization did, in measurement results is related to the “Rebound Effect”. Therefore, the relevant advices for implementing the emission policy of China were, improving energy technology creativity, revolving the examining ways, saving energy in constructions and adjusting industrial structure etc.