This study investigates the application of pneumatic sediment agitation technology in addressing severe siltation behind high-pile wharves, with a focus on Beilun Port in Ningbo, China. Traditional dredging methods face significant limitations in such constrained environments, often resulting in high costs, operational risks, and rapid sediment reaccumulation. To overcome these challenges, a pneumatic sand scouring method utilizing high-pressure gas injection was implemented to mobilize and transport sediment via enhanced water turbulence. Field experiments, including multibeam surveys and plumb line measurements, were conducted to evaluate hydrodynamic effects, topographic changes, and dredging efficiency. Results show that pneumatic agitation effectively increases surface flow velocities and facilitates sediment transport, with a point dredging efficiency of 26 m3/h and a comprehensive efficiency of 13 m3/h. Additionally, the resiltation rate post-dredging was observed to be significantly higher than natural accumulation rates, highlighting the need for adaptive sediment management strategies. The findings demonstrate the feasibility and operational advantages of pneumatic sediment agitation as an innovative and cost-effective dredging solution in confined port environments.