In the investigation of Xi'an ground fissures,the higher the fold of seismic reflection exploration,the higher the signal-to-noise ratio profile is obtained.Nevertheless,it also increases the difficulty of field work and raises the exploration cost.In order to study the effect of different folds in Xi'an ground fissure seismic exploration,the authors chose seismic reflection data in three different sites as examples for analysis.These seismic data were processed in different stacking folds via the method for reducing shot points.The stacking profiles with different folds were compared with each other to extract exploration effect in combination with validated borehole information.It is believed that,if original field records have high signal-to-noise ratios,12 reflection folds can significantly determine the ground fissure anomalies,with 6 reflection folds being the minimum.