In　the　present　research,　photo-responsive　controlled-release　hexaconazole　(Hex)　nanoparticles　(Nps)　were　successfully　prepared　with　azobenzene　(Azo)-modified　bimodal　mesoporous　silica　(BMMs),　in　which　beta-cyclodextrin　(beta-CD)　was　capped　onto　the　BMMs-Azo　surface　via　host-guest　interactions　(Hex@BMMs/Azo/beta-CD).　Scanning　electron　microscopy　(SEM)　confirmed　that　the　nanoparticles　had　a　spherical　structure,　and　their　average　diameter　determined　by　dynamic　light　scattering　(DLS)　was　found　to　be　387.2　+/-　3.8　nm.　X-ray　powder-diffraction　analysis　and　N-2-adsorption　measurements　indicated　that　Hex　was　loaded　into　the　pores　of　the　mesoporous　structure,　but　the　structure　of　the　mesoporous　composite　was　not　destroyed.　The　loading　capacity　of　Hex@BMMs/Azo/beta-CD　nanoparticles　for　Hex　was　approximately　27.3%.　Elemental　components　of　the　nanoparticles　were　characterized　by　X-ray　photoelectron　spectroscopy　(XPS)　and　electron　dispersive　spectroscopy　(EDS).　Ultraviolet-visible-light　(UV-Vis)　absorption　spectroscopy　tests　showed　that　the　azophenyl　group　in　BMMs-Azo　undergoes　effective　and　reversible　cis-trans　isomerization　under　UV-Vis　irradiation.　Hex@BMMs/Azo/beta-CD　Nps　exhibited　excellent　light-sensitive　controlled-release　performance.　The　release　of　Hex　was　much　higher　under　UV　irradiation　than　that　in　the　dark,　which　could　be　demonstrated　by　the　bioactivity　test.　The　nanoparticles　also　displayed　excellent　pH-responsive　properties,　and　the　sustained-release　curves　were　described　by　the　Ritger-Peppas　release　kinetic　model.　BMMs　nanocarriers　had　good　biological　safety　and　provided　a　basis　for　the　development　of　sustainable　agriculture　in　the　future.