Abstract: According to the type of rock burst in Sanhejian Mine, velocity distribution in coal pillar region of the serrated stopping line was inversed through seismic computed tomography detection technology. Characteristics of stress concentration, weakening level and hazard level in coal pillar region of the serrated stopping line was estimated according to the criterion of seismic computed tomography detection technology, which contains assessment parameters of wave velocity anomaly A_n and wave velocity gradient anomaly V_G. The results show that micro-seismic energy in coal pillar region of the serrated stopping line accounted for 60.2% of the micro-seismic energy in mining area; in coal pillar region of the serrated stopping line, positive anomaly A_n of wave speed was about 14%, characteristic of stress concentration was weak, negative anomaly A_n of wave speed was about 18%, weakening level was medium, value was about 11%, hazard level was weaken. Finally, we use targeted pressure relief measures to avoid the stress concentration phenomenon in coal pillar region of the serrated stopping line, and the safety of the working face of mining and extraction was ensured.