In the environment of Matlab, we construct Support Vector Machine (SVM) to build a kind of nonlinear mapping relationship between seismic sequence characteristic parameter and sequence type, and do the early pre- dictions of earthquake sequence types. On the basis of Ms≥5.0 earthquake sequences in China since 1970, we divide the data in 5 time scales according to one, two, three, five and seven days after the earthquake and apply the SVM to the early predictions of earthquake sequence types. The results show that it achieves good recognition and fast processing speed, and has a strong practicability.