In　recent　years,　higher　demands　for　offshore　pipeline　design　of　deepwater　installation　are　put　forward.　This　paper　mainly　aims　to　investigate　the　influence　of　pipelay　parameters　on　dynamic　tension　behaviour　of　deepwater　S-lay　pipeline　to　optimize　the　design　of　pipe　structure　and　tensioner.　A　full　finite　element　model　for　deepwater　S-lay　systems　is　developed　to　simulate　the　dynamic　response　of　offshore　pipeline　from　the　pipelay　vessel　via　stinger　to　the　seabed.　The　influences　of　water　depth,　outer　diameter　and　submerged　self-weight　of　the　pipe,　and　stinger　length　on　the　dynamic　tension　behaviour　of　the　pipeline　have　been　quantitatively　studied.　A　strong　relevance　between　the　axial　tension　of　offshore　pipeline　and　pipelay　parameters　is　observed,　which　offers　very　intuitive　evidences　for　the　design　of　pipe　structure　and　tensioners.