In　order　to　study　the　influence　of　monolithic　slab　on　the　realization　of　Strong　Column　Weak　Beam　design　philosophy　in　reinforced　concrete　(RC)frame　structures,　crack　distribution　of　a　RC　frame　structure　in　an　actual　project　subjecting　to　lateral　loading　was　investigated.　A　corresponding　numerical　analysis　model　was　simulated　to　conduct　a　intensive　research　in　ABAQUS.　It　shows　that　monolithic　slab　not　only　improves　the　actural　bending　resistance　of　frame　beam　by　slab　rebar　paralelling　to　the　beam　rib,　but　also　affects　the　internal　forces　of　frame　beam　and　column　mainly　in　two　ways:(1)　changes　the　bending　moment　distribution　at　beam　end　on　two　sides　of　joint　by　influencing　linear　stiffness　of　frame　beam;　(2)　generates　a　global　structure　torsion　and　makes　weak　axis　bending　moment　at　beam　end　and　toque　at　top　of　column　get　much　larger　when　lateral　displacement　turns　large,　because　of　the　nonuniform　distribution　of　slab　plane　stiffness　in　actual　RC　frame.　Therefore,　if　the　influence　effects　mentioned　above　are　considered　reasonably　during　designing　stage,　the　strong　column-weak　beam　philosophy　will　be　realized　preferably.　©　2018,　The　Editorial　Board　of　Journal　of　Basic　Science　and　Engineering.　All　right　reserved.