A　combined　experimental　and　numerical　study　was　conducted　to　investigate　the　quasi-static　and　dynamic　mode　Ⅰ　fracture　behavior　of　laminated　composites　toughened　by　carbon　nanotube　(CNT)　films.　Fracture　tests　under　quasi-static　and　dynamic　loading　conditions　were　carried　out　by　using　electronic　universal　testing　machine　and　electromagnetic　Hopkinson　bar　device　respectively.　It＇s　illustrated　that　the　CNT　films　can　suppress　the　propagation　of　interlayer　cracks　effectively.　Dynamic　strengthening　effect　was　also　observed　for　CNT　toughened　composites　during　tests.　For　numerical　simulations,　the　three-linear　cohesive　zone　model　(CZM)　was　proposed　to　simulate　the　Mode　I　delamination　of　CNT　films　toughened　composites　under　quasi-static　loading　condition.　Furthermore,　rate-dependent　parameters　were　introduced　into　this　model　by　user-defined　subroutine　to　describe　the　dynamic　fracture　behavior　of　toughened　composites.　This　developed　numerical　model　was　validated　by　comparing　with　dynamic　crack　propagating　speeds　obtained　from　experimental　tests.　During　the　dynamic　delaminating　process,　the　average　crack　propagation　rate　of　toughened　composites　decreased　while　the　energy　release　rate　increased,　indicating　that　the　interlayer　CNT　films　can　hinder　the　dynamic　delamination　effectively.　©　2023　Elsevier　Ltd