Quantum　dots　(QDs)　exhibit　exceptional　optical　qualities,　including　wide　excitation　wavelength,　small　full　width　at　half　maximum　(FWHM),　and　photobleaching　resistance.　It　had　been　used　to　make　color-converting　diffusers　for　backlight　modules.　In　this　study,　the　QDs　were　added　into　masterbatches　to　prepare　composite　components　with　the　functions　of　diffusion　and　color　conversion.　Using　a　coextrusion　approach,　masterbatches　were　made　by　adding　suitable　ratio　of　red　and　green　QDs　as　color　conversion　materials　in　polystyrene　(PS),　silicone　difussion　powder　as　the　light　diffusing　agent,　and　adding　antioxidants　to　improve　the　service　life　of　the　masterbatch.　After　that,　the　QD　color　masterbatch　with　uniform　dispersion,　controllable　concentration　and　good　luminescence　performance　was　obtained.　A　spectrometer　was　used　to　examine　the　photoluminescence　performance　of　the　created　masterbatches　in　order　to　validate　their　luminescence　performance.　As　a　result,　the　use　of　QDs　masterbatches　is　a　viable　option　for　the　application　of　high　performance　QD　display　device.　©　2022　SPIE.