Using the analytic method of correlation function, study is done on the interrelations among strong earthquakes with M>7.0 occurred in Burma convert construct area, Southwest Yunnan revolve construct area, Xingdukushi moderate-deep source earthquake area and those occurred in West Chinese mainland and its neighbouring region since 1900. The results show that seismicities in Burma convert construct area, Southwest Yunnan revolve construct area and Xindukushi moderate-deep source earthquake area have certain corresponding relation with that of other seismic active areas in time and space. This result has significance on the strong earthquake prediction in West Chinese mainland and its neighbouring region.