Based on the summer precipitation index (June-August) of North China determined in the relevant paper,the present paper calculates the synthetic contrast field of the mean circulation of the typical drought/flood years. It is found that the discrepance of atmospheric circulation is distinct in the previousperiod of the drought/flood year,especially in winter. The correlative features of the drought and flood index(DFI) and the circulation are consistent with those of the drought/flood synthetic contrast field. The calculation result shows that the propagation path of the teleconnection is the same as that of the wave energy theoretically calculated. And their positive and negative regions in the teleconnection map are also consistent with those of the drought/flood synthetic contrast field.