At present, for our country being faced with the 5 periods of earthquake in the century, it is very important to probe regularity of earthquake.Our study shows there is a close relationship between characteristic lines of geomagnetic anomalies and earthquakes pointes of the 20 century in China.Those characteristic lines are from polycomponetal geomagnetic anomalies (degree n =4~11, by spherical harmonic function).Earthquake points are distributed along with the characteristic lines, especially at the in...