This　paper　presents　an　experimental　investigation　on　the　web-crippling　behavior　in　glass　fibre　reinforced　polymer　(GFRP)　pultruded　profiles　with　channel　section.　A　main　bending　main　crack　on　the　web　is　the　main　failure　mode　in　the　test.　The　effects　of　the　loading　positions,　the　supporting　conditions　and　bearing　lengths　on　the　web　crippling　behavior　of　GFRP　pultruded　profiles　with　channel　section　are　discussed.　Specimens　with　interior　bearing　load　have　higher　ultimate　strength　and　all　the　specimens　with　loading　conditions　IG　reached　the　highest　ultimate　strength　but　all　ruptured.　Ultimate　strengths　of　GFRP　pultruded　profiles　with　channel　section　can　not　be　enhanced　by　increasing　the　length　of　the　bearing　plate.　Finite　element　models　were　developed　to　numerically　simulate　the　test　results　in　the　terms　of　ultimate　loads,　failure　modes　and　load-displacement　curves.　Based　on　the　results　of　the　parametric　study,　a　number　of　design　formulas　are　proposed　in　this　paper　to　accurately　predict　web　crippling　ultimate　capacity　of　pultruded　GFRP　channel　sections　under　four　loading　and　boundary　conditions.