Abstract: The relationship between the summer rainfall over Northeast China and the previous heat content anomaly in the western Pacific warm pool(WPWP) and the way how heat content anomaly probably affects the precipitation in Northeast China has been investigated by using the historical ocean temperature analysis data provided by Japan Meteorological Agency, the NCEP/NCAR reanalysis data, the Hadley Centre sea surface temperature(SST) dataset and rainfall data. The results show that there is a close negative corrclationship between the summer rainfall over Northeast China and the previous heat content a-nomaly in the WPWP, through which a good predictor, i. e. the 0-200 m heat content averaged over October to November in the key area(15.5°-20.5°N, 125.5°-135.5°E) of the WPWP, is found for the precipitation of the following summer in Northeast China. The East Asia-Pacific(EAP) teleconnection stimulated by the previous heat content anomaly of the WPWP. and the wave train propagating eastward along the Asian westerly jet stream in the upper level of the mid-latitude region may be the main reason that influences the summer rainfall over Northeast China. When the 0-200 m heat content over the previous October to November in the key area is negative, the anomalous Philippine Sea anticyclone persists and EAP teleconnection appears during the summertime, leading to the westward extending and enhancing of the western Pacific sub- tropical high(WPSH) as well as the formation of the local anomalous cyclone over Northeast China and the Okhotsk blocking high. Meanwhile there exists a teleconnection wave train propagating eastward along the Asian westerly jet stream in the upper troposphere so that the local anomalous cyclone over Northeast China and WPSH near Japan can be enhanced, which is conducive to more rain in Northeast China. Otherwise, the summer rainfall is suppressed.