In　this　paper,　taking　the　Jiaozhou　Bay　Subsea　Tunnel　with　a　curved　wall　in　Qingdao　as　the　research　background,　while　assuming　that　the　liquid　cannot　be　compressed　and　considering　the　effect　of　surface　gravity　waves,　a　harmonic　wave　is　used　to　simulate　a　sea　wave.　Considering　coupling　effect　of　stress　and　seepage　fields,　dynamic　responses　of　subsea　tunnels　under　the　action　of　ocean　waves　and　earthquakes　are　discussed.　The　results　show　that　with　an　increase　in　water　depth,　the　maximum　equivalent　stress,　the　first　principal　stress,　the　third　principal　stress　and　the　displacement　of　the　tunnel　structure　all　increase.　When　the　water　depth　reaches　a　certain　value,　the　influence　of　sea　waves　on　the　calculation　results　is　so　small　that　it　can　be　ignored,　and　the　influence　of　the　sea　wave　on　the　displacement　is　smaller　than　that　on　the　stress.　After　considering　sea　waves,　the　increases　of　velocity　and　acceleration　with　different　sea　water　depths　are　far　less　than　5%　under　the　action　of　an　earthquake.　The　influence　of　sea　waves　on　dynamic　responses　of　subsea　tunnels　may　not　be　considered　when　the　sea　water　depth　is　more　than　40　m.