Abstract: On February 18, 2020, an M4.1 earthquake occurred in Changqing District, Ji'nan. After the earthquake, Shandong earthquake agency set up a temporary seismic network of 4 portable seismographs in the earthquake area which recorded more microearthquakes that cannot recorded by fixed seismic stations. The positioning accuracy of aftershocks was greatly improved, the temporary seismic network can effectively improve the seismic monitoring ability in the focal area after an earthquake and provide scientific data support for the determination of seismic activity trend after earthquake. The rapid networking of temporary seismic monitoring stations also demonstrates the service capacity of the seismic monitoring center, improves the efficiency of earthquake emergency flow monitoring, and provides a strong guarantee for the rapid networking of seismic flow monitoring.