Abstract: In this paper, basing on the previous two papers, the function method of seismic comprehensiveeffect field is further applied in short-term of earthquake. Taking large North China area (33°-43°N, 110-125°E) as an example, the comprehensive effect field of the earthquakes of M_L ≥ 3 occurred in thearea in one year is used to predict the occurrence places of earthquakes of M_S ≥ 4 in the mext season. 80seasons are calculated and predicted by the data from 1970 to 1990, the earthquakes occurred in the predicted area makes up 83% of the total earthquakes which should be predicted, the predicted area whereearthquakes occurred makes up 50.5% of the total predicted area. The earthquake density in predicted area is 60-70 times larger than that outside the predicted area, the effect is quite clear. Meanwhileit is tried to be applied in monthly prediction and year prediction, and its effect is relatively good.