The　loading　paths　can　be　obtained　with　the　topology　optimization　and　different　loading　paths　are　related　to　different　internal　forces.　Taking　the　internal　forces　as　the　object　or　constraint,　the　loading　paths　can　be　obtained　to　meet　the　various　demands　with　the　topology　optimization,　which　provides　new　ideas　and　new　methods　for　the　development　of　topology　optimization　research.　To　obtain　the　loading　paths　with　different　internal　force　requirements,　the　structures　can　be　separated　to　expose　the　internal　forces　based　on　substructure　method.　A　topology　optimization　model　was　established　to　minimize　the　weight　with　internal　force　as　constraint.　The　internal　force　was　explicit　with　the　independent,　continuous,　mapping　(ICM)　method　and　the　unit　load　method.　The　internal　forces　were　added　to　get　the　total　internal　force　on　the　controlled　loading　paths.　The　ratio　of　the　internal　forces　on　two　loading　paths　reached　a　stable　value　by　iteration　to　obtain　the　loading　path　meeting　the　internal　force　constraint.　The　numerical　examples　show　that　different　loading　paths　can　be　obtained　with　different　internal　force　constraints.　©　2016,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.