When designing a high-piled wharf with pontoon, we need to take the influence of pontoon into account, but there is little research on this project. Based on that, we conduct the model experiment under combined conditions of different water stages and same wave parameters. The model experiment includes three projects, i.e. without pontoon, only pontoon, and pontoon with steel approach bridges in front of the wharf. According to the model experiment we obtain the horizontal wave force and the uplift wave force of three experimental schemes and analyze the effect of pontoon. The experimental results show that the transmission effects of pontoon and approach bridges increase the horizontal wave force to wharf and the blocking effects of pontoon to wharf decrease the uplift wave force to wharf.