The three methods to extracting the synthetic precursory anomaly and the related numerical results can be applied into the practice of the grouped-earthquake prediction in the Sichuan-Yunnan region.

• 研究结果表明，在川滇地区，单个6级地震与成组强震的前兆群体异常表现有较大差异，成组强震前兆群体异常信息更为丰富。