The　Base　Force　Element　Method　(BFEM)　is　a　simple　and　effective　method　for　calculating　large　elastic　deformation　problems.　In　this　paper,　BFEM　is　further　developed　to　make　it　useful　for　structural　stability　analysis.　The　generalized　unbalanced　displacement　vector　and　composite　tangent　compliance　matrix　of　the　four-mid-node　element　and　rod　element　of　BFEM　are　proposed.　BFEM　can　be　combined　with　the　Arc-Length　Method　(ALM)　to　analyze　the　stability　of　frame　and　truss　structures.　Through　the　calculation　of　several　typical　cases,　the　solution　of　this　paper　agrees　well　with　the　theoretical　solution　and　the　reference　solution　given　by　other　methods.　It　is　proved　that　the　four-mid-node　element　and　rod　element　of　BFEM　have　high　calculation　accuracy　in　case　of　structural　instability　or　post-buckling.　In　the　calculation　of　the　Lee　frame,　the　calculation　results　of　the　four-mid-node　element　of　BFEM　are　closer　to　the　reference　solutions　than　those　of　the　CPS4　and　CPS4R　elements　of　general　finite　element　software.