Based on the definition and analysis of 10-day precipitation drought events, the anomalies of the 500hPa signal field duringmeteorological droughts in the Haihe River Basin were investigated with 40 10-day precipitation drought events from 1961 to 2009, usingempirical orthogonal function analysis. The results showed that the relative variance contribution of the first mode is 35.3%, much higherthan those of other modes; and there are three abnormal areas in the 500hPa signal field: two negative ones and a wide stretches of positiveone. The abnormal spatial pattern of soohPa signal field meant that the Haihe River Basin is under the control of warm high, and the coldair and warm air can not meet over it, which would cause severe drought in the Haihe River Basin eventually.