Due to the complex water and sediment movement in muddy coast, we need to arrange the wrap-around breakwater when constructing a port.Taking a coal-fired power plant in a similar area for example, according to the ship maneuvering simulation test and wave, tidal current, sediment and warm water discharge mathematical model test results, we demonstrate the importance of the wrap-around breakwater for preventing wave and sand, improving the anchor stablility in the harbor, reducing sedimentdeposit and controlling warm water discharge.