Prediction index system model of medium-strong earthquakes in Liaoning is established using analytic hierarchy based on better predictors reflecting the earthquake in Liaoning. On this basis, we built the judgment matrix,with 1-9 ratio scale and then calculated the weight of each index. The results showed that the top three weight indicators were the foreshock sequence, fluid anomalies and b value in short-term predictors among 10 better predictors reflecting the earthquake. The analytic hierarchy process model also indicated that comprehensive predication index Y with medium-strong earthquakes in the Liaoning area, Y value can better reflect the strong or weak of earthquake precursor and abnormal reliability in Liaoning area. When Y≥ 1.41 （If there is a foreshock sequence then Y≥2.59）, medium-strong earthquakes will be likely to occur in Liaoning in a short-term.[著者文摘]