介绍西安地铁测量基准控制网的现状，指出目前基准控制网存在的不足，结合实际进行分析，探讨建立稳定，完整的、具有起算参数的测量基准网，对基准网的维护和使用提出相应的办法。针对西安特殊的地质条件地裂缝和沉降漏斗，提出利用基准网对地裂缝和沉降漏斗进行监测的办法，为工程建设提供决策依据。

This article presents a brief introduction to the status of Xi’an metro control network datum and points out its defects． Through analysis，it suggests that stable and complete survey datum with initial parameters should be established，and appropriate measures for datum network maintenance should be adopted． In view of the geological conditions of Xi’an with many ground fissures， datum network is recommended to be adopted in construction to monitor the special ground fissures and ground surface settlement troughs．