We　propose　a　method　to　suppress　the　speckle　noise　in　holographic　display　using　time　multiplexing.　The　diffractive　optical　elements　(DOEs)　and　the　subcomputer-generated　holograms　(sub-CGHs)　are　generated,　respectively.　The　final　image　is　reconstructed　using　time　multiplexing　of　the　subimages　and　the　final　subimages.　Meanwhile,　the　speckle　noise　of　the　final　image　is　suppressed　by　reducing　the　coherence　of　the　reconstructed　light　and　separating　the　adjacent　image　points　in　space.　Compared　with　the　pixel　separation　method,　the　experiments　demonstrate　that　the　proposed　method　suppresses　the　speckle　noise　effectively　with　less　calculation　burden　and　lower　demand　for　frame　rate　of　the　spatial　light　modulator.　In　addition,　with　increases　of　the　DOEs　and　the　sub-CGHs,　the　speckle　noise　is　further　suppressed.　(C)　2017　Society　of　Photo-Optical　Instrumentation　Engineers　(SPIE)