Abstract: In this paper, on the basis of analysis of the present state of the activity of microearthqnakes in Ningxia, two earthquake situation windows has been found, namely Guyuan window in south of Ningxia and Wuzhong window in north of Ningxia. Using the "window" method, the activity of microearthquakes of two "window" has been studied. And it has been found that the frequency of microearthquakes of these earthquake situation-windows increases before local moderate earthquakes. This paper also discusses the prediction indexes of these "windovs".