Abstract: The characteristics of meridional wave train in teleconnection in winter and summer are investigated by using mean westerly profile data. The numerical analysis shows the distinct seasonal characteristics of teleconnection wave train due to seasonal differences between the mean westerly profile in winter and that in summer, i.e. there are distinct seasonal differences in the propagation of rays, trapping zone, variation of wave refractive index with latitude, resonant features of meridional wave train forced by large scale topography and maritime heat source. In this paper, the correlations between large scale topography, heating source and characteristics of meridional wave train in teleconnection are also discussed.