Quantum　dots　(QDs)　are　one　kind　of　photoluminescent　materials　with　excellent　properties,　such　as　adjustable　spectrum,　narrow　full　width　at　half　maximum　(FWHM),　and　high　color　gamut.　In　this　paper,　a　photoluminescent　QDs　printing　paste　suitable　for　light　guide　dots　array　applied　in　the　backlight　for　liquid　crystal　display　(LCD)　was　presented.　The　QDs　printing　paste　was　first　prepared　and　characterized　with　different　kinds　of　solvents.　Then,　triphenyl　phosphite　(TPP),　a　kind　of　antioxygen,　was　added　into　the　QDs　printing　paste　to　improve　the　stability　of　the　QDs　printing　paste.　Finally,　a　QDs　light　guide　plate　(LGP)　was　fabricated　by　screen　printing　with　QDs　printing　paste　added　with　silicon　dioxide　(SiO2)　light　scattering　particles.　The　color　gamut　of　QDs　LGP　arrived　131.6%NTSC　due　to　light　scattering　interaction　between　blue　LED,　red　QDs,　green　QDs,　and　SiO2　particles.　The　results　showed　that　the　QDs-chloroform　printing　paste　had　uniform　light　output　and　the　highest　photoluminescent　peak　intensity.　Therefore,　the　composite　screen　printing　paste　has　wide　application　prospects　in　the　backlight　of　LCD,　with　the　advantages　of　simple　process,　high　production　efficiency,　and　low　cost.　©　2023　Society　for　Information　Display.