Based　on　the　new　pile-plate　bridge　structure　project　of　the　coastal　national　highway　in　Fujian　Province,　the　hydrodynamic　experiments　of　the　pile-plate　bridge　structure　under　the　impact　of　plunging　waves　were　conducted　in　the　wave　flume.　The　wave　climbing　height　and　the　wave　forces　of　the　pile-plate　bridge　structure　under　the　impact　of　three　stages　of　plunging　waves　were　investigated,　and　compared　to　those　under　the　impact　of　regular　waves.　The　influence　laws　of　the　incident　wave　height,　wave　period,　and　depth　of　the　water　on　the　wave　climbing　height　and　the　wave　force　were　analyzed.　The　results　show　that　the　hydrodynamic　characteristics　of　the　new　pile-plate　bridge　structure　impacted　by　the　three　stages　of　plunging　waves　are　significantly　different,　there　is　evident　wave　climbing　phenomenon　in　the　about　breaking　and　breaking　stages,　and　the　wave　surface　elevation　after　the　climb　of　the　plunging　wave　in　the　about　breaking　stage　attains　1.　99　times　of　the　regular　wave;　the　horizontal　wave　force　of　the　plunging　wave　at　the　about　breaking　stage　is　the　strongest,　which　is　4.　48　times　of　the　amplitude　of　the　vertical　wave　force　in　the　same　stage,　and　can　be　3.08　times　of　the　horizontal　wave　force　of　the　regular　wave.　The　wave　parameters　and　water　depth　significantly　influence　the　hydrodynamic　characteristics　in　three　stages　of　plunging　waves.　With　the　increase　of　the　incident　wave　height　and　water　depth,the　wave　surface　elevation　and　vertical　wave　force　in　the　breaking　stage　exceed　other　stages.　The　increase　of　wave　period　makes　the　wave　surface　elevation　in　the　complete　breaking　stage　and　the　vertical　wave　force　in　the　about　breaking　stage　exceed　those　in　the　breaking　stage.　©　2024　Chinese　Vibration　Engineering　Society.　All　rights　reserved.