Abstract: The area of non horizontal surface and varied surface structures compared with the area of horizontal surface and stable surface structure may have big changes in incident angle and emergent angle of seismic ray, so its space position of seismic imaging obtained by existing methods may have big horizontal displacement by comparing with real formation space location. This study suggests that for non horizontal surface, the structural space position displayed by seismic profile is in error, compared with the real geologic structure location, and the offset distance can be given by X=hsinθ; for horizontal surface, but the surface structure is in big lateral changes, the structural space position given by time domain seismic profile is also in error compared with the real structural location. In complex surface area, static correction should take account of the changes of incident and emergent angles, which may cause the changes of time-distance curves, otherwise, it will allow the problem not belonging to static correction to be more complicated, thus influencing the follow?up work. Therefore,complex surface imaging method including surface relief and surface structure lateral changes is the key of precise seismic imaging for complex surface area; the time-depth conversion for non horizontal surface area should take account of the matching of seismic profile (including velocity profile) and real structural space location