With　the　saturation　of　coastal　wind　power　resources　development，China’s　offshore　wind　power　is　rapidly　developing　toward　deep-sea　and　large-scale　direction.　However，　deep-sea　wind　power　is　confronted　with　the　high　cost　of　submarine　cable　landing　and　the　difficulty　of　grid-connected　consumption.　To　solve　the　above　pain　points，a　centralized　offshore　platform　ammonia　production　mode　based　on　deep-sea　wind　power　was　proposed　to　realize　the　diversified　off-grid　consumption　of　offshore　wind　power.　At　the　same　time，based　on　the　levelized　cost　of　ammonia，combined　with　the　domestic　engineering　cost　system，an　economic　model　of　the“production-storage-transportation　of　green　ammonia　based　on　offshore　wind　power”　was　constructed.　The　cost　structure　of　ammonia　production　with　deep-sea　wind　power　was　analyzed.　The　economic　sensitivity　of　ammonia　production　with　deep-sea　wind　power　was　explored　under　key　influencing　factors，such　as　ammonia　capacity，offshore　distance，water　depth，and　transportation　method.　The　results　show　that　offshore　wind　farms　and　the　device　of　water　electrolysis　for　hydrogen　production　&　green　ammonia　synthesis　account　for　most　of　the　capital　cost　and　device　cost　of　ammonia　production，respectively.　With　the　increase　in　ammonia　capacity　and　the　decrease　in　offshore　distance，the　cost　of　ammonia　production　decreases　gradually.　When　the　ammonia　capacity　is　no　less　than　300　tons　per　day，the　economic　efficiency　of　ammonia　production　is　favorable.　The　change　in　the　type　of　ammonia　production　platform　caused　by　the　increase　in　water　depth　in　the　sea　area　causes　a　step　increase　in　the　cost　of　ammonia　production.　When　the　offshore　distance　is　less　than　800　km，　the　cost　of　pipeline　transportation　is　lower　than　that　of　ship　transportation，and　vice　versa.　The　research　results　provide　suggestions　and　guidance　for　the　economic　evaluation　of　ammonia　production　with　offshore　wind　power，which　is　of　great　significance　for　the　development　and　utilization　of　deep-sea　wind　power　and　the　construction　of　a　multi-energy　complementary　system　integrating　offshore　wind　power，green　ammonia，and　hydrogen　energy.　©　2025　Editorial　Board　of　China　Offshore　Oil　and　Gas.　All　rights　reserved.