Abstract: Promoting the green development of the dairy farming industry is an important way to help industry overcome difficulties and achieve rural revitalization strategy. This paper defines the connotation of the green development of the dairy farming industry from the two aspects of ecological environment impact and social economic benefits, measures the overall, multi-dimensional and regional green development levels of our country from 2009 to 2021 using the data from 27 provinces, and explores its evolution characteristics by using the Dagum Gini coefficient, the Moran's index and the Kernel density estimation method. Results show that: 1) the green development level of the dairy farming industry in China as a whole and in different production areas is on the rise, with the ecological environment impact level being higher than the social economic benefits, and the growth rate is lower than it; 2) the overall Gini coefficient of the green development of the dairy farming industry in China has decreased, and the main source is the regional differences, with different levels of differences within and between different production areas; 3) the green development of the dairy farming industry has spatial positive correlation, showing the characteristics of “high-high aggregation and low-low aggregation”, and the aggregation effect has weakened; and 4) the evolution characteristics of the green development of the dairy farming industry in the whole country and the five major production areas are different, but overall, it shows a trend of reduced regional differences and weakened polarization. Based on the above results, this paper suggests promoting the green development level of the dairy farming industry in China from three aspects: to build a systematic guarantee system, to formulate differentiated development strategies, and to explore coordinated development models.