Combining with the monitoring of some foundation pit in Beijing,the paper analyzes the displacement and change law for the anchor cable stress in the foundation pit excavation,and ensures the safety of the existing buildings around the foundation pits,so as to provide some ref-erence for the safety construction of the pits.%结合北京市某基坑工程的实际情况，对该基坑进行了监测，根据监测数据，分析了基坑开挖过程中位移及锚索应力的变化规律，保证了基坑周边已有建筑的安全，为基坑安全施工提供数据依据。
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