Abstract: In the process of seismic exploration,because of the terrain,facility,personnel's carelessness and other factors,some recorded shot positions inevitably deviate from its real sites.Not only do harm for static correction and NMO,but also affect gathering and stacking seriously.It compounds signals from different reflection points and results in false conclusions.The influence of shot position's deviation on the seismic data stacking accuracy is analyzed here,and also introduces some methods on shot position check and correction.It is helpful for refined seismic data processing.