This study takes the patent information of China's electric agricultural machinery technology as the research object, and uses patent measurement analysis method and visual analysis tools to carry out statistical analysis and comparative research on the relevant patent information from the perspectives of annual patent applications, patent structure, technological key, main applicants, patent layout, technology lifecycle and so on. The research results show that China's electric agricultural machinery technology innovation is developing rapidly, and the patent categories are mainly utility model and invention patents, and the proportion of invention patents is lower than utility model patents. Universities are the most important innovation subjects in this field, and technology research and development focuses on IPC (international patent classification) subcategories such as A01C (seeding, fertilization), B60K (power, transmission), and A01D (harvesting, mowing). Jiangsu Province and Shandong Province rank the top 2 in the number of domestic patent applications, and the United States and Japan are the two countries with the most layout in China. At present, the growth of electric agricultural machinery technology is weak, but the new technology has strong features, there is no sign of maturity, and it does not have signs of technological aging and still has greater development potential. The results of the study can provide information reference for clarifying the status quo, characteristics and development trend of China’s electric agricultural machinery technology innovation.