本文采用观测值曲线的分段拟合方法,对北京地区部分断层位移测量资料进行处理。并在此基础上以唐山7.8级地震为例,提出用方差检验的方法判别震前异常。认为震前约一年的时间里异常比较明显,一些测点的趋势异常时间可达数年。以此可作为判别地震前兆的一个标志。 In this paper, the section fitting method of observation curve is used to deal with partial fault displacement measurement data in Beijing. On the basis of this, taking the Ms8.8 Tangshan earthquake as an example, this paper proposes to use the method of variance test to judge the anomalies before the earthquake. It is considered that the anomalies were obvious in the time of about one year before the earthquake and the trend anomaly of some measuring points could reach several years. This can be used as a sign of discrimination precursors.