Abstract: To enhance the processing speed and accuracy of multibeam bathymetric anomaly data, and to address the limitations of traditional filtering methods, we proposed a threshold-constrained semi-automatic processing method based on multi-ping data based on the threshold gate method. In this approach, median filtering is incorporated to improve its robustness. By comparing real data with those of manual editing, median filtering, and trend surface method, the accuracy and efficiency of the threshold qualification method were evaluated. Results indicate that the median threshold method showed high accuracy and efficiency, meeting the precision requirements for processing multibeam bathymetry data. This approach provided a reference for addressing the challenges associated with large volume multibeam bathymetric data processing.