Abstract: In order to promote the development of agricultural large- scale operation in China, this paper constructed a calculation model for agricultural moderate large-scale operation to estimate moderate scale of China’ s major crops and of different agricultural varieties in different regions based on the analysis of present situation of agricultural large-scale operation. The results showed that the national average moderate scale of grain production area, vegetables in large or medium cities, cotton and apple was 7.3, 0.61, 21.42 and 0.37 hm2, respectively. Moderate raising scale of hog and sheep was 388 and 234.8, respectively. In addition, for different varieties of agricultural products, the author estimated their moderate scales in different provinces. The study provided scientific basis for speeding up agricultural land circulation and realizing moderate largescale management in our country. And the paper put forward countermeasures and suggestions of agricultural land circulation based on the results to encourage farmers to lease their land, to innovate mechanism of cooperatives and to formulate modern agricultural industrial consortium.