Local scour of the Hong Kong-Zhuhai-Macao bridge artificial island is a key technical problem to be solved in bridge project design. . Based on the field data analysis and physical model validation, using the normal extension method of series models, we study the flow pattern variation and local scour around the artificial island. The results show that in the flood season of spring tide situation, the maximum scouring depth of the east andwest island is 10.3 m and 9.0 m respectively, and the scour concentrates in the island bridge and tunnel with protective section and near the anti-collision pier; The maximum scour depth relates to the artificial island geometry, flow velocity, sand characteristics of the engineering water area and depth of such related, and the scouring plane form relates to the island type, flow angle, speed difference of the rising and falling tide, and tidal duration as well.