Thick and hard roofs is a key factor inducing coal burst in coal mining, and the use of overlength horizontal hole staged fracturing technology to decompress the thick and hard roofs has become an effective means to prevent and control coal burst. In order to analyse the effect of overlength horizontal hole staged fracturing on the prevention and control of thick and hard roofs-type coal burst, the 11-3107 working face of coal mine in Ordos was taken as the research object, and microseismic monitoring, support working resistance monitoring and surface subsidence monitoring means were comprehensively used to carry out the analysis. The results show that overlength horizontal hole staged fracturing has a significant effect of unloading energy and weakening load shedding. The microseismic energy, frequency and supporting pressure of the working face after the implementation of overlength horizontal hole staged fracturing for thick and hard roofs were greatly reduced, and the surface subsidence was on the trend of increasing, with the average daily microseismic energy and frequency being reduced by 1.1×105J and 27, or about 67.50% and 33.75%, respectively, and the supporting pressure being reduced by 21.5%, and the surface subsidence being increased by about 87.59%. The integrity of the roof is weakened and its strength is reduced after the implementation of overlength horizontal hole staged fracturing for thick and hard roofs, so that it can be broken and collapsed in time after coal mining, and it is not easy for energy to accumulate in the roof, and the overhanging area is reduced, which reduces the dynamic load during the mining period, and then reduces the risk of coal burst induced by the breaking of the thick and hard roofs. The overlength horizontal hole staged fracturing has a positive effect on reducing the risk of thick and hard roofs-type coal burst, and the results of the study can provide a reference for the prevention and control of thick and hard roofs-type coal burst．