Digital seismic network in Jiangsu province is a key reconstruction project of China Earthquake Administration in "the Tenth Five-year Plan". In the paper, the construction content, network layout, monitoring capacity and function of digital seismic network in Jiangsu province were introduced. After the completion, the digital seismic network will be more reasonable in layout and with larger dynamic range and higher accuracy. The construction will play an important role in improving the technical level of earthquake monitoring and prediction, promoting rapid.