Abstract: According to the requirements of ground stress test in the research of aquifuge on the coalmine water hazard control field, this paper introduced anelastic strain recovery method（ASR）which is maturely used in the field of petroleum exploration and development. Ground stress is measured by core-drilling through this method, and its principle, testing process, samples sampling and the main stress and directions calculation were described in detail. The example showed that: the crustal stress state of 11^# coal floor in Baode Coal Mine is normal fault stress environment, the maximum principal stress is between 5.3 MPa and 7.9 MPa, the minimum principal stress is between 4.7 MPa to 7.3 MPa, the horizontal maximum principal stress direction is between NE46.9 ° to NE69.5 °.