本文清理了吉林省地震前兆台网在省内中等地震，邻区中强以上地震、西太平洋地震带大震前记录到的１４次前兆异常．通过震例统计，筛选出省内前兆映震敏感测点和敏感测项．根据映震范围曲线求出最低映震震级为３．０级左右，线性区内最大映震距离为６００～８００ｋｍ．对５级地震的反映距离为２００～３００ｋｍ． In this paper, 14 precursory anomalies recorded before the moderate earthquakes in the province, above moderate strong earthquakes in the adjacent areas, and before the great earthquake in the western Pacific seismic zone were cleaned up by the earthquake precursor network in Jilin Province. Through the earthquake case statistics, we can select the sensitive points and sensitive precursors in the province. According to the mapping range curve, the minimum reflection magnitude is about 3.0, and the maximum reflection distance in the linear region is 600 ~ 800km. The reflection distance of the M5 earthquake is 200 ~ 300km.