Defect　passivation　and　iodine　management　of　perovskite　film　are　proved　to　be　effective　methods　to　improve　the　power　conversion　efficiency　(PCE)　and　stability　of　perovskite　solar　cells.　Here,　a　binary　passivation　strategy　with　dibenzo-24-crown-8-ether　(DB24C8)　and　hexylammonium　bromide　(HABr)　as　the　co-passivators　is　proposed.　Host-guest　complexes　between　DB24C8　and　Pb2+　cations　and　hydrogen　bonds　between　DB24C8　and　formamidine　cations　are　formed　in　perovskite　layer.　Besides,　the　oxidation　of　the　volatilized　I-　anions　from　perovskite　will　be　combined　to　form　I2　molecules,　which　can　complex　with　DB24C8　and　then　form　new　I-　anions　and　fill　iodine　vacancies　in　perovskite.　Meanwhile,　HABr　can　coordinate　with　perovskite　framework　and　form　a　two-dimensional　(2D)　HA2PbI2Br2　layer　on　top　of　the　3D　perovskite.　More　importantly,　hydrogen　bonds　formed　between　DB24C8　and　HABr　reduce　the　coordination　rate　between　HABr　and　the　perovskite　skeleton,　thereby　decelerating　the　growth　of　2D　HA2PbI2Br2　crystals　and　diminishing　the　formation　of　other　low-dimensional　perovskite　impurities.　This　binary　passivation　strategy　dramatically　reduces　the　trap　states　in　the　perovskite　film,　and　the　optimized　device　shows　a　PCE　of　24.17　%　with　an　excellent　stability.