Abstract: In order to eliminate the outburst risk of high gas and low permeability coal seam, the stress field monitoring technology is used to monitor and test the effect of coal seam hydraulic cave building, and the stress evolution law of coal seam before and after hydraulic cave building is analyzed. The research results show that the stress changes of coal seam around the borehole are different in space. The closer the borehole is to the borehole, the more obvious the stress changes of coal seam are; after the completion of the construction of the borehole, the earlier the stress changes of the position near the borehole, the more single the change trend, the greater the pressure relief amplitude; the farther the borehole is to the borehole, the later the stress changes, and the more complex the change trend compared with the results of gas pressure measurement, the monitoring results of stress field can fully reflect the implementation effect and influence range of hydraulic hole making.