A large number of seismologic windows in a great area,especially in the Tianshan earthquake belt,show ed clear anomaly during the Jiashi strong earthquake swarm from 1997 to 1998.Strong earthquakes of the swarm can be divided into five groups according to the occurrence time.The first strong earthquake of each group can be checked out by the monthly and ten-days microseism frequencies of Kashi and Atushi seismic window s.The succedent strong earthquakes of each group can be checked out by the daily microseism frequency of the Kashi and Atushi seismic window s.It can be found from the anomalous features that strong earthquakes occurred usually after a high value of monthly frequency or after a low value of ten-days frequency and after a low value of daily frequency.It can be also found from the temporal process of the window anomalies that the duration and interval of the anomalies of Kashi and Atushi seismic windows during Jiashi earthquake swarm are longer than those of a single event.The duration of the anomaly during the first strong shock of each group is longer than that of the succedent strong earthquake.The daily frequencies of the two windows notably increased before the succedent strong earthquakes occurred from the exponential attenuating background in 1997,but in 1998 the daily frequencies increased before the strong earthquake occurred in the normal background.The results of the analyses indicate that the earthquake window is a valuable method in earthquake prediction.