Nanocrystalcellulose/silver　nanoparticles　(AgNPs)　reinforcing　hydroxypropyl　cellulose　nanocomposite　membranes　were　prepared　using　a　casting/evaporation　technique.　SEM,　TEM,　XRD,　EDS,　and　DMA　were　used　to　characterize　chemical　structure　and　properties　of　the　resultant　nanocomposite　membranes.　Results　show　the　mechanical　properties　of　HPC/NCC/AgNPs　membrane　were　improved　due　to　the　strong　interactions　between　AgNPs/HPC　and　NCC　molecular　chain.　The　results　of　TEM　and　SEM　showed　that　the　AgNPs　dispersed　well　in　the　matrix　and　the　AgNPs　had　a　regular　crystal　structure.