采用超限率分析法，处理距离安庆地震较近的合肥台、黄山台体应变和泾县水管倾斜仪及伸缩仪数据，结果发现，两台体应变数据均在震前20天左右出现明显异常变化，异常形态与前人的研究基本一致。泾县水管东西向超限率分析结果也有异常变化，异常形态与体应变不同。

This article analyzed volume strain of Hefei and Huangshan seismic station, and cave strain of Jingxian seismic station with Over Rate Analysis(ORA). The result indicate significant abnormal changes about 2 months before Anqing earthquake, abnormal morphology consistent with previous studies. The result of water tube tiltmeter also indicate significant changes, but the change shope is different from cave strain.