Abstract: There is only a few logging data in Huagou area,west of Boxing depression.The difference in wave impedance of strata here is very little,making The classification of sedimentary facies by conventional seismic attribute analysis not satisfactory.Aiming at this problem,we probed the high precision palaeotopography recovering technology and seismic symbiosis voxel clustering technology for classifying sedimentary facies.In the study of palaeotopography recovering technology,the correction and calibration defining problem about recovering fiduciary level for palaeotopography were discussed.In seismic facies analysis,symbiosis voxel technology in graph processing was inducted to probe the seismic attribute symbiosis voxel clustering technology.Finally,palaeotopography recovering result and seismic symbiosis voxel technology analysis results were comprehensively used to classify the sedimentary facies of targets.