Abstract: Featuring in getting ground level information with its quickness and accuracy, Airborne LiDAR system play an important part in coastal zone storm tide prevention ability assessment.Extracting information of embankment, island elevation and land development and utilization in the research area based on airborne lidar point cloud data and aerial image data, and simulating storm surge submergence range by DEM are accomplished to evaluate the embankment construction and its anti-storm surge capacity in the research area.It shows that 12.54% of the embankment in Yanzhou Island is lack of storm tide prevention ability; 71.38%、83.17%、84.18% of the island is at risk of storm tide accordingly at the water level of 3.5 m、4.4 m、4.6 m。