AbstractWe analyze the records of 56 stations in Himalaya area with the method of minimizing the eigenvalue. Splitting was observed at thirty‐nine stations of them. The average splitting time is about 0.8s. The parameters of splitting vary not only from south to north, but are also different on the two sides of the line joining the station GAIG and T0040. To the west of the line, FPD (fast polarization direction) is mainly NWW or NW. To the east of it, FPD is NNE to the south of MBT. In Lesser Himalaya area FPD is NE or NEE and it becomes N‐S or NEE in Tethys Himalaya area. Comparing with other studies, we deem that the difference of splitting parameters between east and west is produced by laterally heterogeneous collision between Indian plate and Eurasian plate. The variety from south to north to the east of AA' was produced by the complicated structure in this area.