In order to reduce the top of the seawall elevation safely and reliably, we analyze the domestic and international norms of the tolerable overtopping limit, and study the operation condition, design condition and check condition and corresponding tolerable overtopping limit for three conditions for Hongkong-Zhuhai-Macau bridge Zhuhai-Macau frontier port artificial island reclamation works. Combining the physical model test, we carry out the optimal design of wave overtopping of seawall. By controlling the height difference between the artificial island ground and the top of the seawall elevation in the range of normal human height, we can offer well sky and sea view for passengers.