Abstract: Taking the 40204 fully mechanized working face of Xiaozhuang Coal Mine as an example, the distribution and activity characteristics of microseismic events in the fully mechanized working face in rockburst coal seam of composite roof were analyzed. The periodic regularity of microseismic events, the relationship between microseismic activities and mining stress, and the distribution regularity along working face tendency were emphatically analyzed. Through analysis, it is found that 40204 goaf of composite roof has less influence on leading stress concentration in the working face, while the adjacent goaf has greater influence on roadway. When a large area of goaf is formed, the high roof above the goaf will form a linkage effect, which increases the impact of the composite roof in the working face. According to the analysis results of microseismic characteristics, the measures to prevent and relieve pressure of composite roof are formulated. The 40204 working face has been stoped and no impact has occurred, which indicates that the measures taken to relieve the pressure are reasonable, and the results of microseismic monitoring are in line with the field reality.