High strength warp knitted polyester geogrid is used in the structure of the stone throwing breakwater. The natural mud surface foundation treatment in the construction area adopts a 1m thick sand cushion layer, plastic drainage boards are installed, and high-strength warp knitted polyester geogrids or high-strength composite geotextiles are laid; The core of the embankment is made of 10-100kg block stones, with a 200-400kg cushion layer of block stones on top. The protective structure is made of twisted Wang shaped blocks, with 200-400kg low protection block stones on both sides of the core. Concrete top pressing blocks are placed on the top of the embankment. High strength warp knitted polyester geogrid has the characteristics of high strength, low creep, high node strength, easy construction, and excellent durability.