Abstract:In this paper, a three-stage DEA model is used to study the input-output efficiency of regional science popularization of China in 2014. Two thirds of provinces are effective in terms of technical efficiency or pure technical efficiency after excluding three environmental variables and statistical noise, such as the level of education, the level of technological development, and the network environment, which is a relatively promising finding. However,the national average scale efficiency decreased significantly, and 13 provinces with increasing returns to scale need to expand the scale of science popularization. For the eastern and western regions, it is necessary to improve the scale efficiency in the optimal allocation of science popularization resources. The central region is expected to catch up with the advanced areas in the management and technical level of science popularization.