The　deepwater　J-lay　pipeline　exhibits　pronounced　dynamic　responses　in　the　touchdown　zone　(TDZ)　compared　to　the　S-lay　pipeline.　This　paper　demonstrates　a　refined　numerical　model　built　upon　the　vector　form　intrinsic　finite　element　(VFIFE)　method　for　the　J-laying　pipeline,　employing　the　equivalent　beam　particle　technique　to　discretize　the　pipeline　into　beam　elements　and　particles.　The　model　precisely　captures　stress-strain　behaviors　at　the　pipeline　cross-section　in　the　TDZ　and　enables　a　comprehensive　analysis　of　static　and　dynamic　responses.　The　simulation　for　a　12-inch　diameter　pipeline　at　a　1000　m　laying　depth　is　implemented　and　compared　to　the　calculation　from　OrcaFlex　with　the　consistent　results.　The　stress　and　strain　in　the　lower　section　are　higher　than　those　in　the　upper　section,　where　peak　stress　and　strain　reach　177.95　MPa　and　0.080%.　Moreover,　the　internal　force　distribution　in　the　TDZ　is　systematically　analyzed　under　varying　pipe　diameters,　submerged　weights,　and　laying　angles.　Increasing　the　pipe　diameter　amplifies　internal　forces,　while　submerged　weight　primarily　affects　tension　and　bending　moment.　And　raising　the　laying　angle　from　70°　to　85°　sharply　increases　peak　stress　and　strain.　The　proposed　model　provides　a　precise　tool　for　analyzing　deepwater　J-laying　pipeline　behaviors　in　the　TDZ.　©　2024　Elsevier　Ltd