Abstract: The deformation of the large diameter prestressed concrete tubular pile subjected to external forces is tested on the spot by applying fiber grating sensing technology. Based on test results, the related mechanical parameters of the large diameter prestressed concrete tubular pile were obtained by an inverse analysis. At the same time, the epoxide resin at the joint gap has little effect on the mechanical properties of the large diameter prestressed concrete tubular pile. The reasonable mechanical parameters obtained by the inverse analysis provide useful data for stress analysis and health monitoring of the large diameter prestressed concrete tubular pile under variousengineering conditions.