Abstract: The time-space distributive characteristics of normalizing entropy value of seismic activities within 50 kms on both sides of Liaokao fault before and after the Haze earthquake (Ms5.6) in 1983 have been studied in this Paper and thus it is concluded that the variation of the entropy value before the earthquake (Ms 5.9)showed an obviously low value anomaly.Based on the characteristics of entropy variation after the earthquake, the seismic tendency in the region was estimated.