In　strong　winds,　impact　of　windborne　debris　on　building　envelope　is　a　main　reason　that　be　responsible　for　chain-like　and　regional　disasters.　Accurately　understanding　the　trajectory　of　windborne　debris　is　crucial　for　disaster　prevention　and　mitigation.　This　paper　focuses　on　the　common　six　degree-of-freedom　(6-DOF)　windborne　debris　and　introduces　a　theoretical　model　of　the　three-dimensional　(3D)　trajectory.　The　improved　Euler　and　4th-order　Runge-Kutta　methods　are　respectively　presented　for　solving　the　trajectory　model.　Using　the　data　from　the　Wind　Tunnel　Laboratory　at　the　University　of　Auckland,　two　numerical　algorithms　are　compared　and　the　influence　of　different　factors　on　trajectory　simulation　is　analyzed.　It　is　found　that　using　the　4th-order　Runge-Kutta　method　can　simulate　the　trajectory　of　windborne　debris　more　accurately　and　efficiently.　The　influence　of　the　flight　potential　and　aerodynamic　configuration　of　the　windborne　debris　on　trajectory　simulation　is　revealed,　based　on　which　the　time　step　suggestion　function　is　proposed.　©　2025　Tsinghua　University.　All　rights　reserved.