Abstract: According to the data of Poland SOS microseismic monitoring system，the seismic source evolution law near the synclinal axis is analyzed combining with the actual conditions of 250204 working face in Yanbei. The conclusions are as follows: during the period of mining，and when the working face is in the synclinal axis，the seismic source are mainly distributed above the coal seam，that is，the microseismic activity mainly occurs near the roof. When the working face is moving away from the synclinal axis gradually，seismic source distributions have a tendency to the lower side of coal seam，which means that the micro-seismic activity occurs mainly near the floor. When the two factors of syncline axis and the working face square overlay，rock burst tendency increases significantly. At last，the energy-frequency law of rock burst for synclinal axis tectonic is summarized which plays an important role in the production practice.

Key words: Synclinal axis, Micro-seismic activity, Rock burst, Seismic source evolution, Energy-frequency