Abstract:Based on ECMWF 7-level monthly mean geopoptential height anomaly data. the present paper has calculated the Correlation coefficient distribution of several key circulational teleconnection indices and the geopotential height anomaly of each level. Results show that the barotropieal and baroclinic geological difference of circulational abnormality is closely related to the vertical structure of the teleeonnection pattern with the PNA,WP,WA,EA and EU being barotropical; however, the correlation distribution of the SO index and height anomaly of each layer changes in the tropical Pacific from the east-west out-of-phase seesaw oscillation of the low troposphere into the even anticorrelation of the mid and high troposhere,whieh proves the existence of the strong baroclinity in east tropical Pacific. The cireulational abnormality from December to February in the tropical Indian Ocean appears to be barotropical;from June to August, baroclinic. Same results are obtained through analysis of hybrid empirical orthgonal functions.