Abstract:The block-jointed together processing technique of 3-D prestick seismic data is not single processing technique,but a systematic engineering,which should follow the guided idea of "consideration in full scale,fine analysis,overall handling and implementation in separate steps".Through a set of systematic block-jointed together processing technique of 3-D prestick seismic data such as integrative usage of unified definition of grid in whole area,unified computation of statics in whole area,unified buildup of velocity field in whole area and a series of surface-consistent processing,matching filtering and bin-size uniformization,the paper eliminates the difference in seismic data among different blocks,avoids distortion of data on boundary of different blocks and reaches the goal of seem-free link of 3-D prestack seismic data.The amplitude energy,phase character and band width in data volume after block-jointed together processing are natural and reasonable,and the consistent level of useful reflection information from reflection horizons in block-jointed positions has been greatly improved.