Selecting earthquakes occurred in different areas of Shandong Province and adjacent regions, rules of locating sub-array selection are studied based on analyzing the influence of station distributions on the accuracy of locating result. The difference of locating deviation, horizontal error, fitting residual with clearance angle, variation with near station and far station, and relation of locating deviation with horizontal error and fitting residual in the circumstances of two different types of station distribution were discussed, respectively. The results indicate that it is suitable to select 4 to 9 stations for earthquake locating in rapid report. It is relatively suitable to evaluate the quality of the locating result with horizontal error.%选取山东及邻区4个不同区域的地震,分析“定位子台网”分布对地震定位精度的影响,研究“定位子台网”的选取规则.探讨两种台站分布情况下定位偏差、水平误差、拟合残差随空隙角、近台距离、远台距离的变化；定位偏差及水平误差与拟合残差的关系.结果显示,速报时选择4-9个分布相对合理的“定位子台网”参加定位,结果较好,使用水平误差估计,定位结果质量比较适合.
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