Agriculture is the foundation of the national economy. The application of digital technology in the field of agriculture can improve agricultural modernization. The theoretical mechanism show that digital technologies play an important role on improving agricultural production efficiency, promoting the integrated development of agricultural industry and other industries, the quality of agricultural products, optimizing the entire agricultural industry chain. By calculating and comparing the location entropy, the correlation degree, and using Data Envelopment Analysis (DEA) of the agricultural industry. The empirical study finds that the overall level of agricultural industry agglomeration in China needs to be improved, and the regional differences in the degree of agricultural industry correlation are obvious, and the agricultural production efficiency is low. Therefore, we suggest that accelerating the application of digital technology in the agricultural product circulation and service industry, developing digital application in key agricultural production; and deepening the integration of digital and agriculture to achieve agricultural modernization faster and better.