[Purposes] The geological unit of Padma Bridge in Bangladesh is composed of clay, silt, silt and ultra-fine sand, and the pile foundation is all friction piles, which are designed to improve the bearing capacity of the pile foundation through grouting at the bottom of the pile and the side of the pile. In order to determine the change law of the bearing capacity of the bridge pile foundation in each stage of grouting process, the pile foundation of the Padma Bridge is designed with three types: load test pile, process test pile and formal pile, among which the process test pile and the formal pile design structure are the same.[Methods] The 10 load test piles are distributed in different sections along the bridge site, and the bearing capacity of the pile foundation in a specific elevation section needs to be tested. The load test pile needs to be tested under static load and pile dynamic analyzer (PDA test) on deep foundation, and the bearing capacity of the load test pile before and after grouting at the bottom of the pile and after grouting on the side of the pile is analyzed, so as to provide a basis for the design and construction of the formal pile of the bridge. The PDA test is carried out before the formal pile grouting is carried out, and by analyzing the bearing capacity values of the formal pile and the geological survey pile, it can be determined whether the bearing capacity of the formal pile before grouting meets the design requirements. [Findings] After the formal pile grouting of the Padma Bridge, the negative friction resistance of the pile top displacement uplift appears around the pile, and the elastic compression of the steel pile occurs during the PDA test, resulting in the displacement of the pile top is less than the displacement of the pile bottom, when the single displacement of the pile end is less than 2mm, the bearing capacity of the pile end can not be fully excited, and the PDA test of the process test pile shows that the PDA test can not detect the bearing capacity of the pile foundation of the process test pile (formal pile) after grouting . [Conclusions] After the formal pile grouting of the Padma Bridge, the negative friction resistance of the pile top displacement uplift appears around the pile, and the elastic compression of the steel pile occurs during the PDA test, resulting in the displacement of the pile top is less than the displacement of the pile bottom, when the single displacement of the pile end is less than 2mm, the bearing capacity of the pile end can not be fully excited, and the PDA test of the process test pile shows that the PDA test can not detect the bearing capacity of the pile foundation of the process test pile (formal pile) after grouting .