介绍预应力混凝土连续刚构桥挠度长期观测的目的、方法、监测数据整理、误差分析以及挠度变化规律分析。通过已测得的虎门大桥辅航道桥挠度观测数据 ,并进行挠度变化规律分析 ,可对该类型桥的使用状况有一个直观的认识 ,从中找出可能发生的病害 ,及时采取补救措施 ,进而能为改进此类桥梁的设计提供宝贵的依据 This paper introduces the purpose and method of long-term deflection analysis of prestressed concrete continuous rigid frame bridge, the analysis of monitoring data, error analysis and deflection variation. Based on the observed deflection data of the aisle bridge on the Humen Bridge and analysis of the variation of deflection, an intuitive understanding of the condition of the bridge can be obtained, and possible diseases can be found out and remedial measures can be taken in time. Provide a valuable basis for improving the design of such bridges