Abstract: According to the local earthquake magnitude formula, this paper uses the station base noise value to inversely calculate the minimum magnitude of the epicenter distance to calculate the current monitoring capacity of the Guangxi seismic network. Through calculation, it is obtained that the regional seismic monitoring capacity of Guangxi basically reaches M_L1.4. The monitoring capability of the provincial junction basically reached M_L1.6, and the Beibu Gulf area reached M_L1.8. After the completion of the "the 12th Five-Year Plan" project in Guangxi, the earthquake monitoring capacity of Guangxi will reach M_L1.2. The minimum integrity magnitude (EMR) method is used to calculate the earthquake catalog of Guangxi and neighboring areas from 2008 to 2020, and the regional minimum integrity magnitude MC value is M_L1.7, which is 0.1 level larger than the calculated by using the station noise value under the same seismic catalogin station conditions. It shows that the regional seismic monitoring capability obtained from the calculation of base noise can truly reflect the current monitoring capability.