Based　on　the　results　of　quasi-static　tests　on　ancient　wooden　structures　with　spatial　lifting　beams,　six　sets　of　finite　element　numerical　models　were　constructed　with　mortise　and　tenon　joints,　friction　coefficient,　and　the　presence　or　absence　of　roofs　as　variables,　and　the　influence　of　these　variables　on　model　accuracy　was　explored.　The　research　results　demonstrate　that　the　established　numerical　model　can　accurately　simulate　the　deformation　characteristics　of　the　structure　during　the　loading　process.　The　hysteresis　curve　is　inverse　S-shaped　and　exhibits　a　clear　＂pinching　effect,＂　which　aligns　with　the　actual　energy　consumption　characteristics　of　wooden　structures.　Regarding　stress　performance,　the　simplification　of　the　gap　between　mortise　and　tenon　joints　and　the　roof　has　a　significant　impact　on　the　bearing　capacity　and　stiffness　of　the　model.　Conversely,　the　variation　of　friction　coefficient　between　wood　has　a　relatively　small　impact　on　the　mechanical　performance　of　the　model.　This　study　elucidates　the　pivotal　elements　that　influence　the　precision　of　numerical　simulations　of　spatial　timber　structures　through　a　comparative　analysis,　thereby　furnishing　a　crucial　reference　for　the　establishment　and　rectification　of　subsequent　numerical　models　of　timber　structures.　©　2024　Science　Press.　All　rights　reserved.