In the measurement of inland waterway beach hazard，the traditional measurement method has the problems of single type of results，low accuracy and efficiency，and unguaranteed personnel safety.Based on the principles and methods of UAV airborne laser bathymetry technology，this paper demonstrates its applicability in terms of detection capability，wave correction，very shallow water measurement，flight conditions and other aspects based on the characteristics of inland waterway beach hazard measurement. It concludes that the technology is flexible and efficient，it can provide high-density terrain point cloud data on water and land，which greatly improves the efficiency and accuracy of results，and it can meet the needs of inland waterway beach hazard measurement，but more deeper research is needed to improve the accuracy of very shallow water measurement，the impact of water quality conditions，echo identification processing technology，and the impact of large specific drop on the water surface.