利用兰州台阵与兰州台数字化近两年的资料，对地震震相特征和震级进行了对比分析，结果发现：地震记录震相特征基本相同，台阵有压低干扰背景和突出地震波信号的功能，说明台阵对记录较微弱地震有优势；在震中距小于1000km的范围内，兰州台阵的监测能力较明显高于兰州台，而震中距大于1000km时，兰州台阵与兰州台的监测能力基本相当。

We used the past two years data of Lanzhou seismic array and Lanzhou digital station contracted and analysed seismic phases features and magnitude, the results show that: a) the features of seismic phases between Lanzhou seismic array and Lanzhou digital station are almost the same, however, seismic array have recording weaker earthquake advantage can efficiently suppress background noise and interference; b) when epicentral distance less than 1000km, monitoring ability of Lanzhou seismic array is significantly higher than Lanzhou digital station, epicentral distance greater than 1000 km, the monitoring ability is roughly equal.