Abstract: The modernization of agricultural science and technology at the county level is an important part of the modernization of agricultural science and technology. The joint construction of leading counties in the modernization of agricultural science and technology is an important exploration to promote the modernization of agricultural science and technology. Based on the comparative analysis of national and local agricultural science and technology evaluation indicators and methods, combined with the characteristics of the leading counties in agricultural science and technology modernization, this study puts forward the basic principles and overall ideas for evaluating the development level of agricultural science and technology modernization in counties, and establishes 10 secondary indicators and 40 tertiary indicators from the three aspects of Industrial Science and technology, talent specialization and ecological greening Four types of counties, including agricultural characteristic counties, are given differentiated weights, and a comprehensive index is synthesized through the level index and development index to form an evaluation model for the modernization of agricultural science and technology in the county. The study will provide a useful reference for the dynamic evaluation and construction effect of the leading counties of agricultural science and technology modernization.