介绍了1998年1月10日张北6．2级地震前的地震活动情况和前兆观测异常现象，并从实际观测资料出发，综合分析了前兆异常的总体特征，以及伴随地震孕育过程而表现出来的各种前兆场的时、空、强变化特征及其它们之间的相互联系，以追踪方式探讨了长、中、短、临的阶段性变化，通过对所掌握的河北省各种前兆资料进行剖析，可知张北地震前前兆资料的变化，在一定程度上能够反映出一些有意义的震兆信息，但以此给出准确的短临预报尚显依据不足。 This paper introduces the seismic activity and precursory anomalies before the Zhangbei M6.2 earthquake on January 10, 1998. Based on the observed data, the general characteristics of the precursory anomalies and their associated with the seismogenic process are presented The various precursory fields of time, space, strong changes in the characteristics and their interrelationship between the tracing to explore the long, medium, short and temporary stages of change, through the grasp of various precursor data in Hebei Province The analysis shows that the change of precursory data before the Zhangbei earthquake can reflect some meaningful earthquake information to a certain extent, but the accurate short-term forecast is not enough based on it.