We　propose　that　photon　blockade　can　be　enabled　by　a　two-photon　absorption　environment.　The　valid-ity　of　this　conclusion　is　confirmed　by　studying　the　blockade　in　a　driven　single-mode　cavity.　The　feature　of　this　environmentally　induced　photon　blockade　is　that　the　nonlinear　interaction　in　the　system　is　not　needed,　which　is　entirely　different　from　the　conventional　and　the　unconventional　blockade　mechanisms.　We　clearly　give　the　physics　behind　this　blockade　mechanism.　And　the　advantages　of　this　environmen-tally　induced　photon　blockade　are　discovered　by　comparing　it　with　the　conventional　mechanism　in　a　weakly　driven　region.　In　addition,　we　show　that　the　proposal　can　be　generalized　straightforwardly　to　realize　environmentally　induced　photon　blockade　in　two　coupled　single-mode　cavities.