Abstract: Using VAR model, we select the national time series data from 2008 to 2023 to empirically analyze the dynamic relationship among digital economy, agricultural technological innovation and agricultural economic growth. The results show that the growth of agricultural economy depends more on the improvement of agricultural technological innovation and the development of digital economy. However, the driving force of agricultural economic growth on agricultural science and technology innovation is relatively small, and the digital economy has a siphon effect on agricultural science and technology innovation, which inhibits the latter to a certain extent. Therefore, to develop agriculture through science and technology, we need to actively enhance the level of agricultural science and technology innovation, increase investment in agricultural science and technology innovation, improve rural networks, build big data platforms, promote the transformation of scientific and technological achievements, improve agricultural production efficiency, establish a policy system, provide policy support, and strengthen intellectual property protection.