2008年5月12日发生了汶川8.0级大地震,震前的定点形变观测值曲线异常很少。震后通过对定点形变观测台站的震前数据进行了深入分析和处理,发现在汶川8.0级地震前存在形变异常,且距震中较近的台站,出现的异常信息的频率较高;距震中稍远的台站,出现的异常信息的频率较低。对这些现象进行了初步的解释。 On May 12, 2008, a Wenchuan Ms 8.0 earthquake occurred. Before the earthquake, the fixed point deformation observation curve was very unusual. After the earthquake, through the deep analysis and processing of pre-earthquake data of the fixed-point deformation observation station, it was found that there was anomalous deformation before the MS 8.0 Wenchuan earthquake, and the frequency of the anomalous information appeared higher at stations closer to the epicenter. Slightly distant stations, the frequency of occurrence of abnormal information is low. A preliminary explanation of these phenomena.