Abstract: In this paper, the author carried out the applied study on the method of anomaly recognition and mark system for the precursor subject of the " 95" key problems in Inner Mon-golia area. The half year and month anomaly frequency velocity rate has been studied in adeep going way. The medium-and short-term forecast has been tested for the Baotou 6. 4 earth-quake in 1996 and Zhangbei 6. 2 earthquake in 1998. Alsoobjectively tested and appraised the ability of the medium-and short-term forecast of this method. The result shows that the anomaly frequency velocity rate is better than the anomaly rate of theoriginal figure before the two earthquakes. Therefore, the results obtained show that this method can be applied to the medium-and short-term prediction more effectively.

Key words: Prediction anomaly, Frequency velocity rate, Earthquake prediction, Testing