Abstract: The capability maturity model of bridge lean construction data management is of great significance to assess its service capability and improve the bridge engineering project management capability. This paper combines the existing data management maturity model and engineering management related theories to construct a capability maturity model of bridge lean construction data management based on five stages: initial level, managed level, robust level, quantitative management level, and optimization level. Taking Shenxiang Bridge project as an example, this paper further explores the application of the model. Applied to the Sinkiang Bridge project, the evaluation and optimization methods of data management capability maturity were explored from 8 capability domains and 28 capability items: data strategy, governance, architecture, application, safety, quality, standard, and life cycle. At the end, the paper proposes some suggestions for the development and innovation of lean construction of bridge engineering in China.