This paper measures the carbon emission intensity of grain production in each province based on the panel data of 31 provinces in China from 2001 to 2020, characterizes the technological progress in grain production by the total factor productivity of grain production measured by the DEA-Malmquist model, and analyzes the impact of technological progress in grain production on the carbon emission intensity of grain production and its functioning mechanism by using the two-way fixed effect model. The results show the followings. China's grain production carbon emission intensity showed a trend of first increasing and then decreasing, and the technological progress of grain production showed an increasing trend; the technological progress of grain production was conducive to reducing the carbon emission intensity of grain production, and the technological progress of grain production reduced the carbon emission intensity of grain production by 0.38 t per unit; there wais obvious heterogeneity in the effect of technological progress of grain production on the carbon emission intensity of grain production, and the reduction effect was more significant in the eastern and central regions. Its reduction effect was more obvious in the east and central regions and the main grain producing areas; the mechanism of grain production technology progress to reduce the carbon emission intensity of grain production was to improve the efficiency of chemical fertilizer and pesticide application. For this reason, we should actively bring into play the carbon emission reduction function of technological progress in grain production, promote technological progress in grain production in accordance with local conditions, and focus on promotion of weight-loss and pesticide reduction techniques, so as to continuously improve the efficiency of fertilizer and pesticide application.

technological progress in grain production  /  carbon emission intensity  /  two-way fixed effects model