-Inthispaper,someproblemsinthedesignofthebreakwaterforDayaowanportareaaredescribedincludingtheoptimalselectionofthelayoutplanofthebreakwater;theselectionofstructuraltypeofthebreakwater,theconcreteblocktypeforbankprotection,thereversedL-shapeparapet;theelevationoftheparapet;thestabilitytestofthewholerevetment;aswellaswaveabsorbingeffectsoftheperforated