A　numerical　simulation　study　is　carried　out　to　investigate　the　influence　of　bolt　tightening　process　on　the　distribution　of　bolt　preload　force　and　deformation　of　linear　guide　assembly.　Firstly,　the　basic　principle　of　elastic　interaction　of　bolt　groups　is　described　and　a　mathematical　characterization　model　is　established.　Secondly,　the　influence　of　bolt　tightening　order　is　analyzed,　and　it　is　found　that　the　cross-tightening　result　is　better　than　the　sequential　tightening.　Finally,　the　step-by-step　tightening　strategy　of　bolts　is　studied,　and　the　influence　of　different　tightening　volume　allocation　schemes　on　the　residual　preload　force　of　bolts　and　the　deformation　of　the　guide　rail　assembly　is　analyzed　through　simulation　and　comparison　of　different　tightening　volume　allocation　schemes　under　two-step　cross-tightening.　The　results　show　that　when　the　guide　rail　bolts　are　tightened　by　two-step　cross-tightening　and　the　first　step　tightening　amount　is　70%,　the　consistency　of　the　bolt　residual　preload　is　the　best,　and　the　maximum　deformation　of　the　guide　rail　is　the　smallest.　©　2024　SPIE.