Supporting measures must be taken in construction foundation pit excavation in order to ensure construction safety. In the design and construction of deep foundation pit supporting engineering, project type and other factors must be given full consideration. In this paper, the current security problems of the deep foundation pit supporting, and the cause of the accident are analyzed. Matters needing attention and preventive measures in the design of deep foundation pit are put forward.%在建筑基坑施工时必须对开挖基坑采取支护措施以确保施工安全。在深基坑支护工程的设计和施工中必须充分考虑工程形式等因素。本文对当前深基坑支护存在的安全问题和事故原因进行了相关分析，提出了在设计深基坑中的注意事项和预防措施。
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