The　linear　rolling　guide　with　offset　distance　gothic　groove＇s　ability　of　bearing　heavy　load　is　strong　and　widely　used　in　engineering.　Analytical　Modeling　of　it　is　helpful　for　knowing　its　service　performance　and　choosing　it　properly.　Based　on　Hertz　contact　theory,　this　essay　analyses　the　contact　states　of　groove　at　different　stages　when　linear　rolling　guide　with　offset　distance　gothic　groove　bears　the　normal　load,　constructs　the　normal　model　of　linear　rolling　guide　and　verified　by　experiment.　On　the　basis,　the　essay　analyses　the　influences　of　linear　rolling　guide　parameters　on　normal　stiffness　and　provides　basis　for　the　choice　of　parameters　while　choosing　LM　Guide.