No. 3305 Face of Yangcheng Mine was deeply buried and affected by faults. There were weak impact tendency of roof, floor and coal seam, and this face was close to No. 3303 Goaf, so there was a possibility of rock burst. The mechanism of reducing the impact risk of No.3305 Face by roof deep hole pre-split blasting technology was expounded from two aspects of weakening impact dynamic load and improving regional static load, and the practical application effect was verified by analyzing mine earthquake data. The results showed that after the implementation of roof deep hole pre-split blasting, the frequency and energy of regional mine earthquakes were significantly reduced, indicating that roof deep hole pre-splitting blasting could effectively reduce the energy intensity of mine earthquakes and reduce the degree of regional stress concentration. The research conclusions provided reference for the deep hole pre-splitting blasting technology in the prevention and control of rock burst in the two roadway and fault areas of fully mechanized top coal caving face.