Hybrid　membranes　composed　of　porous　metal-organic　molecule　nanocages　as　fillers　embedded　in　a　hyperbranched　polymer　(Boltorn　W3000)　were　fabricated,　which　exhibit　excellent　pervaporation　separation　performances　towards　aromatic/aliphatic　hydrocarbons.　The　unique　nature　of　the　molecule-based　fillers　and　their　good　dispersion　and　compatibility　in/with　the　polymer　are　responsible　for　the　good　membrane　properties.